Devices and methods for precision dose delivery

ABSTRACT

Disclosed herein are devices and methods for delivering a predetermined volume of a drug substance or other product including a fluid. An exemplary device may include a body configured to receive a drug substance therein, and a plunger rod disposed at least partially inside the body to distally move a stopper in the body. The device may include a component configured to regulate distal movement of the plunger rod in a priming step and in a subsequent delivery step, so that the device may be accurately primed and may accurately dispense a predetermined volume of a drug substance.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation application under 35 U.S.C. § 111(a)of pending International Application No. PCT/US2020/036200, filed Jun.4, 2020, which claims priority to U.S. Provisional Application No.62/857,678, filed on Jun. 5, 2019; and U.S. Provisional Application No.62/860,481, filed on Jun. 12, 2019.

FIELD OF DISCLOSURE

Aspects of the present disclosure relate to devices and methods forpriming or otherwise configuring a dose delivery device, e.g., asyringe, to promote precision dose delivery. More specifically,embodiments of the present disclosure relate to devices and methods forloading, storing, transporting, and/or delivering precise doses of adrug substance or other fluid substance.

INTRODUCTION

Drug products including fluid drug substances may be deliverable topatients in a variety of ways, including via injection. In many cases,the precision and accuracy of a liquid drug product's volume is crucial.For example, medical professionals may have an interest in ensuring thatan approved or prescribed volume of a drug substance is consistentlydelivered to each patient requiring the drug. Additionally, over- orunder-dosing a patient with a drug substance, even slightly, may have anundesired (or even negative) clinical impact on the patient. Moreover,some drug products are prescribed at low volumes (e.g., under 100 μL).At low volumes, human error in preparing and delivering an accurate doseof a drug substance for injection may impact the drug's efficacy in apatient and the subsequent clinical effect on the patient.

Additional aspects of fluid drug delivery can complicate the goal ofaccurate dose delivery via injection. For example, for a correct dose ofa drug substance to be dispensed from a device (e.g., a syringe), acorresponding accurate volume of the substance must be loaded into thedevice. Furthermore, handling, storage, packaging, and/or transportationof loaded devices must not result in inadvertent expulsion of drugsubstance from the devices. Additionally, prior to administration of adrug substance from a device, the device may need to be primed, e.g., toremove air bubbles and excess drug substance from within the device'sneedle and barrel. Incorrectly priming a device may result in expulsionof too much or too little drug substance from the device, which likewisemay result in a decreased dose being delivered to a patient, or airbubbles being injected from the device into the patient.

The present disclosure also addresses needs unmet by prior publicationsWO2018/232408, published on Dec. 20, 2018; WO2018/224640, published onDec. 13, 2018; and WO2018/224644, published on Dec. 13, 2018. Further,at least some embodiments of the present disclosure include featuresthat are different than those features disclosed in publicationWO2019/118588, published on Jun. 20, 2019. Some features include, forexample, a plunger rod including one or more extensions extendingdistally from an actuation portion of the plunger rod and having hook orclip shaped parts for receipt with side openings of a flange piece. Theplunger rod may include a neck having three or more sections, eachhaving a different cross-sectional profile and/or shape relative to oneanother. Further features may include, for example, a flange pieceincluding a collar having one or more internal grooves for receiving thehook or clip shaped parts of the one or more extensions, therebyallowing the extensions to flex radially-outward from a compressedconfiguration to an expanded configuration. The flange piece may includean opening configured to receive each of the three or more sections ofthe neck based on, for example, a rotational arrangement of the plungerrod relative to the flange piece.

A flange piece of the present disclosure may further include one or moremovable ribs and/or one or more movable tabs for engaging a syringe bodyto couple the flange piece to the syringe body. For example, one or moremovable ribs may be positioned proximal to a lip and lateral opening ofthe flange piece for receiving a top flange of the syringe body. Themovable ribs may move, deflect, and/or deform in response to receivingthe top flange through the lateral opening, and may be configured toapply a distally-directed force onto the top flange to secure thesyringe body to the flange piece. By way of further example, the one ormore movable tabs may be positioned distal to the lip and lateralopening. The movable tabs may move, deflect, and/or deform in responseto the flange piece receiving the syringe body, and may be configured toapply a radially-directed force onto the syringe body to secure thesyringe body to the flange piece. It should be appreciated thatembodiments of the present disclosure include various other featuresshown and described herein that are different than those featuresdisclosed in publication WO2019/118588.

SUMMARY

Disclosed herein are drug delivery devices. In one embodiment of thepresent disclosure, a drug delivery device includes a body, a plungerrod disposed partially inside the body, a protrusion extending from theplunger rod, and a blocking component on the body. When the protrusionis in a first position relative to the blocking component, the blockingcomponent restricts distal movement of the plunger rod to a firststopping point, and when the protrusion is in a second position relativeto the blocking component, the blocking component restricts distalmovement of the plunger rod to a second stopping point.

In some aspects of the present disclosure, the drug delivery devicefurther includes a stopper disposed in the body. Distal movement of theplunger rod distally moves the stopper, and a drug substance disposed inthe body in between the stopper and a distal end of the body. Distalmovement of the plunger rod to the first stopping point primes the drugdelivery device, and distal movement of the plunger rod to the secondstopping point dispenses a predetermined volume of the drug substancefrom a distal end of the device.

In some aspects of the present disclosure, moving the protrusion fromthe first position to the second position includes twisting the plungerrod relative to the blocking component. In some aspects of the presentdisclosure, the drug delivery device further includes a cavity in aproximal side of the blocking component, the cavity sized and configuredto receive a portion of the protrusion. When the protrusion is in thesecond position relative to the blocking component, the protrusion ispositioned proximally from the cavity, such that distal movement of theplunger rod moves the protrusion into the cavity.

In some aspects of the present disclosure, the cavity is a first cavity,and the drug delivery device further includes a second cavity in aproximal side of the blocking component, the second cavity sized andconfigured to receive a portion of the protrusion. The first and secondcavity are located on opposite sides of a central longitudinal axis ofthe drug delivery device. In some aspects of the present disclosure, theblocking component includes a flange and is coupled to a proximal endportion of the body, and the plunger rod passes through an opening inthe blocking component. In some aspects of the present disclosure, thedrug delivery device further includes an actuation portion at a proximalend portion of the plunger rod, and the protrusion extends from theactuation portion.

In some aspects of the present disclosure, the actuation portionincludes a generally cylindrical shape having a diameter greater than awidth of the remainder of the plunger rod. The protrusion extends from aside of the generally cylindrical shape, and the actuation portionfurther includes a thumb pad on a proximal end of the actuation portion,and a ring on an exterior surface on the side of the generallycylindrical shape. In some aspects of the present disclosure, the drugdelivery device further includes a proximal collar on the blockingcomponent, and the actuation portion partially fits inside the proximalcollar.

In some aspects of the present disclosure, the plunger rod furtherincludes a pair of extensions protruding distally from the actuationportion and the blocking component includes a pair of openings. Aportion of each extension is configured to be received by one of thepair of openings in the first stopping point. In some aspects of thepresent disclosure, the blocking component includes one or more indentsformed along a bottom wall of the blocking component. A portion of eachextension is configured to be received by the one or more indents upondistal movement of the plunger rod relative to the blocking component toallow distal movement of the plunger rod to the second stopping point.

In some aspects of the present disclosure, the blocking componentincludes a pair of internal grooves formed along a sidewall of theblocking component. A portion of each extension is configured to bereceived by at least one of the pair of internal grooves upon rotationof the plunger rod relative to the blocking component to expand theextensions radially-outward from a compressed state to a relaxed state.In some aspects of the present disclosure, the protrusion is a firstprotrusion, and the drug delivery device further includes a secondprotrusion extending from the plunger rod in a direction opposite to thefirst protrusion. In some aspects of the present disclosure, theblocking component is slidably coupled to the body and includes a pairof internal ribs that are configured to engage a top flange of the bodywhen the body is slidably coupled to the blocking component. The pair ofinternal ribs are configured to apply a distally-directed force onto thetop flange.

In some aspects of the present disclosure, the blocking component isslidably coupled to the body and includes a pair of movable tabs thatare configured to engage a sleeve of the body when the body is slidablycoupled to the blocking component. The pair of movable tabs arelaterally deflectable upon receiving the sleeve in the blockingcomponent and are configured to apply a radially-directed force onto thesleeve. In some aspects of the present disclosure, the blockingcomponent further includes a pair of finger flanges. Each of the fingerflanges includes a textured surface having a predefined pattern thatincreases a grip of the blocking component.

According to another embodiment of the present disclosure, a drugdelivery device includes a body, a plunger rod having a distal endcoupled to a stopper inside the body, and a proximal end including anactuation portion with a thumb pad, a plurality of protrusions extendingfrom the actuation portion, and a blocking component disposed on thebody, the blocking component including a proximal collar. When theprotrusions and the blocking component are in a first configuration, theblocking component restricts distal movement of the plunger rod to afirst stopping point, and when the protrusions and the blockingcomponent are in a second configuration, the blocking componentrestricts distal movement of the plunger rod to a second stopping point.The proximal collar is configured to receive the protrusions upon distalmovement of the plunger rod when the protrusions are in the secondconfiguration.

In some aspects of the present disclosure, the protrusions and theblocking component are movable from the first configuration to thesecond configuration by rotation of the actuation portion about alongitudinal axis in relation to the blocking component. In some aspectsof the present disclosure, a difference between the first stopping pointand the second stopping point is equivalent to a distance that thestopper must travel to expel a predetermined volume of a drug productfrom a distal end of the body. In some aspects of the presentdisclosure, the plurality of protrusions includes two protrusionsdisposed symmetrically about the actuation portion. In some aspects ofthe present disclosure, the blocking component further includes a pairof finger flanges. In some aspects of the present disclosure, the drugdelivery device is a pre-filled syringe.

In some aspects of the present disclosure, the drug delivery device ischangeable: (a) from a pre-use state to a primed state, bylongitudinally moving the plunger rod until the plunger rod reaches thefirst stopping point; (b) from the primed state to a delivery state byrotating the plunger rod in relation to the blocking component until theprotrusions and the blocking component are in the second configuration;and (c) from a delivery state to a used state by longitudinally movingthe plunger rod until the plunger reaches the second stopping point. Insome aspects of the present disclosure, the plunger rod includes a neckdisposed distally from the actuation portion, and the neck interfaceswith an opening in the blocking component to prevent proximal movementof the plunger rod. In some aspects of the present disclosure, the neckfurther interfaces with the opening in the blocking component to preventmovement of the drug delivery device from the delivery state to theprimed state.

In a further embodiment of the present disclosure, a drug deliverydevice includes a body, a plunger rod, including: a distal portioncoupled to a stopper inside the body; a proximal end including agenerally cylindrical actuation portion disposed outside of the body;and two protrusions extending from opposite sides of the actuationportion in a symmetrical configuration. The drug delivery device furtherincludes a blocking component coupled to the body, the blockingcomponent including a collar configured to accept a distal part of theactuation portion and two cavities in the collar havingproximally-facing openings. Each cavity is configured to accept a distalportion of one of the two protrusions. The plunger rod is longitudinallymovable and rotatable about a longitudinal axis relative to the blockingcomponent. When the drug delivery device is in a pre-use state, theprotrusions and the cavity openings are not longitudinally aligned, andwhen the drug delivery device is in a delivery state, the protrusionsand the cavity openings are longitudinally aligned. In some aspects ofthe present disclosure, the blocking component further includes a fingerflange, and the drug delivery device further comprises a ribbed surfaceon a side of the actuation portion.

In a further embodiment of the present disclosure, a method ofdispensing a substance from a drug delivery device having a plunger rodand a body is disclosed. The method includes advancing the plunger rodby a predetermined distance into the body until advancement of theplunger rod is resisted by a stop, rotating the plunger rod about alongitudinal axis, and actuating the plunger rod to dispense apredetermined volume of the substance.

In some aspects of the present disclosure, advancing the plunger rod andactuating the plunger rod include pressing an actuation portion of theplunger rod. In some aspects of the present disclosure, the plunger rodincludes a protrusion, the stop includes a blocking component coupled tothe body, and the blocking component abuts against the protrusion toresist advancement of the plunger rod.

In some aspects of the present disclosure, rotating the plunger rodincludes twisting an actuation portion of the plunger rod relative to ablocking component of the plunger rod, until a protrusion on the plungerrod becomes longitudinally aligned with a cavity in the blockingcomponent. In some aspects of the present disclosure, actuating theplunger rod includes pressing the actuation portion of the plunger rodto advance the protrusion into the cavity.

In some aspects of the present disclosure, the method further includesadvancing the protrusion into the cavity until the protrusion abuts adistal side of the cavity, and the predetermined volume of the substanceis dispensed when the protrusion abuts the distal side of the cavity.

In a further embodiment of the present disclosure, a drug deliverydevice includes a body, a stopper disposed inside the body, and a sleevehaving a proximal end and a distal end. The distal end being disposedinside the body, proximally from the stopper. The device includes aplunger rod disposed at least partially inside the sleeve. When thestopper is in a ready position, distal advancement of one of (a) onlythe sleeve, (b) only the plunger rod, or (c) both the sleeve and theplunger rod together, relative to the body advances the stopper to aprimed position. When the stopper is in the primed position, distaladvancement of another of (a) only the sleeve, (b) only the plunger rod,or (c) both the sleeve and the plunger rod together, relative to thebody advances the stopper to a dose completion position.

In some aspects of the present disclosure, the drug delivery devicefurther includes a removable blocking component disposed between aproximal portion of the sleeve and a proximal end of the body. Theblocking component obstructing distal advancement of the sleeve relativeto the body. Distal advancement of the sleeve relative to the body afterremoval of the blocking component advances the stopper to the primedposition. The blocking component is a clip removably secured around atleast a portion of the sleeve.

In some aspects of the present disclosure, the drug delivery devicefurther includes a removable locking component that couples the plungerrod to the sleeve. Distal advancement of both the sleeve and the plungerrod together relative to the body advances the stopper to the primedposition. Distal advancement of only the plunger rod relative to thebody after removal of the locking component advances the stopper to thedose completion position. In the dose completion position, a proximalend of the plunger rod abuts against a distal end of the sleeve, suchthat the plunger rod is prevented from advancing distally any furtherrelative to the body. The removable locking component includes one of apin, a tab, or a bar.

In some aspects of the present disclosure, the drug delivery devicefurther includes a protrusion disposed on the plunger rod and an innerprotrusion disposed on an interior wall of the sleeve distally to theprotrusion of the plunger rod. Distal advancement of only the plungerrod relative to the body advances the stopper to the primed position andcauses the protrusion of the plunger rod to contact the inner protrusionof the sleeve. Distal advancement of both the plunger rod and the sleeverelative to the body, after the protrusion of the plunger rod hascontacted the inner protrusion of the sleeve, advances the stopper tothe dose completion position.

In some aspects of the present disclosure, a compressible protrusion onthe plunger rod and an opening disposed on an interior wall of thesleeve, proximally from the protrusion on the plunger rod. Distaladvancement of only the plunger rod relative to the body advances thestopper to the primed position. Proximal withdrawal of the plunger roduntil the compressible protrusion of the plunger rod enters the openingof the sleeve couples the sleeve to the plunger rod. Distal advancementof both the plunger rod and sleeve coupled together relative to the bodyadvances the stopper to the dose completion position. In some aspects ofthe present disclosure, when the sleeve is coupled to the plunger rod, atotal length of the combined sleeve and plunger rod along aproximal-distal axis is greater than a length of the plunger rod alone.

In some aspects of the present disclosure, the sleeve includes a fingerflange. In some aspects of the present disclosure, the drug deliverydevice further includes a stop disposed at a proximal end of the body.The stop sized to block distal advancement of the sleeve or the plungerrod once the stopper is in the completion position.

In further embodiments of the present disclosure, a drug delivery deviceincludes a body and a plunger rod having a distal portion disposedinside the body and a proximal portion disposed outside a proximal endof the body. The proximal portion having a width greater than a width ofthe distal portion. The device further includes an obstruction that, inan obstructing position relative to the plunger rod, prevents distaladvancement of the plunger rod from a primed position to a dosecompletion position. Displacement of the obstruction from theobstructing position permits distal advancement of the plunger rod tothe dose completion position.

In some aspects of the present disclosure, the drug delivery devicefurther includes a collar affixed to a proximal end portion of the body.The collar surrounding the proximal portion of the plunger rod. The drugdelivery device further includes a collar projection extending radiallyinward from the collar. The proximal portion of the plunger rod includesa channel into which the collar projection protrudes, the channelincluding a circumferential path and an axial dose completion path. Theobstruction comprises the collar projection, which, when disposed in thecircumferential path of the channel, prevents distal advancement of theplunger rod to the dose completion position. Displacement of theobstruction from the obstructing position comprises twisting the plungerrod about a longitudinal axis to align the collar projection with theaxial dose completion path.

In some aspects of the present disclosure, the channel further includesan axial priming path offset from the axial dose completion path, andconnected to the axial dose completion path by the circumferential path.Distal movement of the plunger rod such that the collar projectiontravels on the axial priming path advances the plunger rod to the primedposition. In some aspects of the present disclosure, the collar furthercomprises a finger flange.

In some aspects of the present disclosure, the proximal portion of theplunger rod includes a projection extending radially outward. The drugdelivery device further includes a rotatable alignment componentdisposed in between the proximal portion of the plunger rod and thebody. The alignment component including a channel, the channel sized andconfigured to accommodate the plunger rod projection. The obstructioncomprises a wall of the channel that blocks a distal axial path of theplunger rod projection when the plunger rod is in the primed position.Displacement of the obstruction from the obstructing position comprisesrotating the alignment component to remove the wall of the channel fromthe distal axial path of the plunger rod projection.

In some aspects of the present disclosure, the drug delivery devicefurther includes a finger flange coupled to a proximal end portion ofthe body. The rotatable alignment component is disposed between thefinger flange and the proximal portion of the plunger rod. In someaspects of the present disclosure, the drug delivery device furtherincludes a flange piece disposed at the proximal end of the body. Theobstruction includes a removable cap that, when in the obstructingposition relative to the plunger rod, is disposed partially in betweenthe proximal portion of the plunger rod and the flange piece. In someaspects of the present disclosure, removal of the cap allows theproximal portion of the plunger rod to advance to a dose completionposition. In the dose completion position, the proximal portion of theplunger rod contacts the flange piece. In some aspects of the presentdisclosure, the removable cap covers the proximal portion of the plungerrod when in the obstructing position.

In some aspects of the present disclosure, drug delivery device furtherincludes a collar disposed between the proximal end of the body and theproximal portion of the plunger rod. The collar defining an openingsized to accommodate the proximal portion of the plunger rod upon distaladvancement of the plunger rod beyond a primed position. The obstructioncomprises a tab protruding radially outward from the proximal portion ofthe plunger rod, the tab preventing the proximal portion of the plungerrod from fitting into the opening of the collar. A depth of the collaropening coincides with a distance the plunger rod must travel to advancedistally to the dose completion position.

In some aspects of the present disclosure, displacement of theobstruction from the obstructing position comprises either removing thetab or compressing the tab into a side of the proximal portion of theplunger rod. In some aspects of the present disclosure, the tab is afirst tab, and wherein the obstruction further comprises a second tabprotruding radially outward from the proximal portion of the plunger rodin a direction opposite the protruding direction of the first tab. Insome aspects of the present disclosure, the obstruction comprises a tabthat, when in the obstructing position, is disposed between the body andthe proximal portion of the plunger rod. The plunger rod includes ageometry disposed proximally from the tab, and the geometry cannotadvance distally past the tab when the tab is in the obstructingposition.

In some aspects of the present disclosure, displacement of theobstruction comprises removing the tab from the drug delivery device bypulling the tab. In some aspects of the present disclosure, the drugdelivery device further includes a flange piece, wherein a portion ofthe tab is disposed inside a cavity of the flange piece. In some aspectsof the present disclosure, displacement of the obstruction comprisesremoving the tab from the drug delivery device by breaking the tab.

In some aspects of the present disclosure, the obstruction includes aflange piece that, in the obstructing position, is disposed proximallyfrom the proximal end of the body, between the proximal portion of theplunger rod and the body, and is spaced from the proximal end of thebody by a removable blocking component. Displacement of the obstructionfrom the obstructing position includes removing the blocking componentand shifting the flange piece distally towards the proximal end of thebody.

In some aspects of the present disclosure, the plunger rod includes aprojection extending radially outward. The obstruction includes a leverhaving an end that, in the obstructing position, is located distallyfrom the projection and blocks distal movement of the projection andthereby distal movement of the plunger rod. Displacement of theobstruction from the obstructing position comprises actuating the leverto remove the end of the lever from its location distal from theprojection. In some aspects of the present disclosure, distaladvancement of the plunger rod beyond the dose completion position isprevented by contact between the proximal portion of the plunger rod anda portion of a flange piece coupled to the body.

In further embodiments of the present disclosure, a drug delivery deviceincludes a body and a sleeve affixed to the body. The sleeve including aproximal end, a distal end, and an opening disposed in a circumferentialwall of the sleeve. The drug delivery device further includes a plungerrod passing through the sleeve, the plunger rod including a distal endportion disposed inside the body, and a radially-extending protrusion.The plunger rod may be distally advanced into the body from a readyposition to a primed position. In the primed position, the protrusion ofthe plunger rod is disposed inside the opening, and further distaladvancement of the plunger rod is resisted by contact between theprotrusion and a wall of the opening. Pressure may be exerted on theprotrusion to overcome the resistance to further distal advancement ofthe plunger rod.

In some aspects of the present disclosure, the opening in the sleeve isa second opening, and the sleeve further includes a first openingdisposed in the circumferential wall of the sleeve proximally from thesecond opening, and a third opening disposed in the circumferential wallof the sleeve distally from the second opening. In the ready position,the protrusion of the plunger rod is disposed in the first opening, andfurther distal advancement of the plunger rod is resisted by contactbetween the protrusion and a wall of the first opening. After furtherdistal advancement of the plunger rod past the primed position, theprotrusion of the plunger rod is disposed in the third opening, andfurther distal advancement of the plunger rod is prevented.

In some aspects of the present disclosure, the radially-extendingprotrusion is a first protrusion, and the plunger rod further includes asecond radially-extending protrusion opposite the first protrusion.Squeezing the first and second protrusions towards one another whileapplying axial pressure in the distal direction on the plunger rodovercomes the resistance to further distal advancement of the plungerrod. In some aspects of the present disclosure, a proximal end of thesleeve includes a flared opening. Distally advancing the plunger rodfrom the ready position to the primed position includes advancing theprotrusion into the flared opening and through the sleeve, whereby theprotrusion is compressed between an interior of the sleeve and theplunger rod, until the protrusion extends into the opening disposed inthe circumferential wall of the sleeve. In some aspects of the presentdisclosure, the protrusion includes a distally-tapering profile to aidin distal advancement of the plunger rod.

In further embodiments of the present disclosure, a drug delivery deviceincludes a body, a plunger rod including a distal end portion disposedinside the body and a rotatable element, and a sleeve affixed to thebody, the sleeve including a proximal opening into which the plunger rodmay be advanced. Rotating the rotatable element causes distaladvancement of the plunger rod to a primed position. Once the plungerrod is in the primed position, further rotation of the rotatable elementis resisted.

In some aspects of the present disclosure, the rotatable elementincludes a cam lever. Once the plunger rod is in the primed position,the plunger rod may be depressed into the body to distally advance theplunger rod to a dose completion position. In some aspects of thepresent disclosure, the drug delivery device further includes a collardisposed at a proximal end of the body, an interior of the collarincluding a proximal threaded portion forming a proximal helical path.The rotatable element comprises a proximal portion of the plunger rodincluding a protrusion. The proximal portion of the plunger rod may berotated about a longitudinal axis to cause the protrusion to traveldistally along the proximal helical path. Once the protrusion reachesthe end of the proximal threaded portion of the collar, the plunger rodis in the primed position.

In some aspects of the present disclosure, once the plunger rod is inthe primed position, the plunger rod may be depressed axially into thebody to distally advance the plunger rod to a dose completion position.In some aspects of the present disclosure, the interior of the collarfurther includes a distal threaded portion. Threads of the distalthreaded portion form a distal helical path offset from, and oppositeto, the proximal helical path. Alignment of the protrusion with thedistal helical path places the plunger rod in the primed position.Rotation of the proximal portion of the plunger rod to cause theprotrusion to travel distally along the distal helical path causesdistal advancement of the plunger rod to a dose completion position.

In further embodiments of the present disclosure, a drug delivery deviceincludes a body, a stopper disposed inside the body, and a first plungerrod having a first proximal end portion and a first distal end portionnarrower than the first proximal end portion. The first distal endportion having a first length. The drug delivery device further includesa second plunger rod having a second proximal end portion and a seconddistal end portion narrower than the proximal end portion. The seconddistal end portion having a second length. The drug delivery devicefurther includes a finger flange affixed to a proximal end portion ofthe body. The finger flange having a through hole aligned with aproximal opening of the body. The through hole sized to accommodate eachof the first and second distal end portions without accommodating eitherof the first or second proximal end portions. Advancement of the firstdistal end portion through the through hole until the first proximal endportion abuts against the finger flange pushes the stopper distally to aprimed position. Advancement of the second distal end portion throughthe through hole until the second proximal end portion abuts against thefinger flange pushes the stopper distally to a dose completion position.

In further embodiments of the present disclosure, a method of assemblinga drug delivery device includes coupling a body to a blocking component,wherein the blocking component is a flange piece, and coupling a plungerrod to the blocking component such that the plunger rod is disposedpartially inside the body in a preassembled state and inhibited fromproximal movement relative to the blocking component. In thepreassembled state, the plunger rod is configured to move distallyrelative to the blocking component to a first stopping point with aprotrusion of the plunger rod engaging the blocking component, therebycausing a priming dose of a medicament to be expelled from the body.When the protrusion is engaged to the blocking component, the blockingcomponent is configured to restrict distal movement of the plunger rodto a first stopping point. The plunger rod is further configured to,while the plunger rod is at the first stopping point, rotate relative tothe blocking component to disengage the protrusion from the blockingcomponent, and move distally relative to the blocking component to asecond stopping point with the protrusion engaging the blockingcomponent, thereby causing a delivery dose of a medicament to beexpelled from the body.

In some aspects of the present disclosure, the method further includesinserting a top flange of the body into an opening of the blockingcomponent causing a tab of the blocking component to deflectradially-outward and a rib of the blocking component to deflectproximally. The tab applies a radially-inward directed force onto thebody and the rib applies a distal force onto the top flange to securethe body to the blocking component. The method further includesinserting an extension of the plunger rod into a side opening of theblocking component to attach the plunger rod to the blocking componentin the preassembled state. The plunger rod is configured to deflect theextension radially-inward in response to moving the plunger rod distallyrelative to the blocking component to the first stopping point, suchthat the extension is removed from the side opening. The extension isconfigured to move against an interior of the blocking component whenthe plunger rod rotates relative to the blocking component to align theprotrusion with a slot of the blocking component. The extension flexesradially-outward within the blocking component when the protrusion isaligned with the slot. The extension is configured to extend into anindent along the interior of the blocking component when the plunger rodmoves distally to the second stopping point.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated into and constitute apart of this specification, illustrate various exemplary embodimentsand, together with the description, serve to explain principles of thedisclosed embodiments. The drawings show different aspects of thepresent disclosure and, where appropriate, reference numeralsillustrating like structures, components, materials, and/or elements indifferent figures are labeled similarly. It is understood that variouscombinations of the structures, components, and/or elements in variousembodiments, other than those specifically shown, are contemplated andare within the scope of the present disclosure.

There are many embodiments described and illustrated herein. Thedescribed devices and methods are neither limited to any single aspectnor embodiment thereof, nor to any combinations and/or permutations ofsuch aspects and/or embodiments. Moreover, each of the aspects of thedescribed inventions, and/or embodiments thereof, may be employed aloneor in combination with one or more of the other aspects of the describedinventions and/or embodiments thereof. For the sake of brevity, certainpermutations and combinations are not discussed and/or illustratedseparately herein.

FIGS. 1A-1E depict an exemplary delivery device and components thereof,according to some embodiments of the present disclosure.

FIGS. 1F-2T depict additional aspects and embodiments of the exemplarydelivery device of FIGS. 1A-1E.

FIGS. 3A and 3B depict an exemplary method of assembling the deliverydevice depicted in FIGS. 1A-1E, according to aspects of the presentdisclosure.

FIGS. 3C-3F depict an exemplary method of assembling an embodiment ofthe delivery device depicted in FIGS. 1A-1E, according to aspects of thepresent disclosure.

FIGS. 4A-4F depict an exemplary method of using the delivery devicedepicted in FIGS. 1A-1E, according to aspects of the present disclosure.

FIGS. 4G-4J depict an exemplary method of using an embodiment of thedelivery device depicted in FIGS. 1A-1E, according to aspects of thepresent disclosure.

FIGS. 4K-4S depict exemplary aspects of plunger rods for use inembodiments of the delivery device depicted in FIGS. 1A-1E.

FIGS. 4T-4X depict views of an exemplary neck portion of a plunger rodand opening of a flange piece in embodiments of the delivery devicedepicted in FIGS. 1A-1E.

FIGS. 4Y-4Z depict exemplary aspects of plunger rods for use inembodiments of the delivery device depicted in FIGS. 1A-1E.

FIGS. 5A-5C depict another exemplary delivery device according toadditional embodiments of the present disclosure.

FIGS. 6A-6E depict a further exemplary delivery device according toadditional embodiments of the present disclosure.

FIGS. 7A-7F depict an exemplary method of using the delivery devicedepicted in FIGS. 6A-6E, according to aspects of the present disclosure.

FIGS. 8A-8E depict a further exemplary delivery device according toembodiments of the present disclosure.

FIGS. 8F and 8G depict a blocking component of the delivery devicedepicted in FIGS. 8A-8E according to embodiments of the presentdisclosure.

FIGS. 9A-9E depict an exemplary method of using the delivery devicedepicted in FIGS. 8A-8E, according to aspects of the present disclosure.

FIGS. 10A-10C depict an exemplary method of assembling the deliverydevice depicted in FIGS. 8A-8E, according to aspects of the presentdisclosure.

FIGS. 10D-10G depict another exemplary method of assembling a variationof the delivery device depicted in FIGS. 8A-8E, according to aspects ofthe present disclosure.

FIGS. 11A-11E depict an exemplary method of using the delivery devicedepicted in FIGS. 10D-10G according to aspects of the presentdisclosure.

FIGS. 12A-12D depict a close-up view of aspects of the exemplary methoddepicted in FIGS. 11A-11E.

FIGS. 13A and 13B depict a further exemplary delivery device and methodof assembling said delivery device, according to additional embodimentsof the present disclosure.

FIG. 14A-14F depict a method of using the delivery device depicted inFIGS. 12A and 12B.

FIGS. 15A-15B, and 16A-16B depict exemplary plunger rod dials accordingto further embodiments of the present disclosure.

FIG. 17 depicts an exemplary plunger rod and dial according to furtherembodiments of the present disclosure.

FIGS. 18A and 18B depict a further exemplary plunger rod and dialaccording to additional embodiments of the present disclosure.

FIGS. 19A and 19B depict an exemplary rotation lock mechanism accordingto additional embodiments of the present disclosure.

FIG. 20 depicts an exemplary plunger rod snap feature according toadditional embodiments of the present disclosure.

FIG. 21 depicts an exemplary plunger rod with a bump feature accordingto additional embodiments of the present disclosure.

FIG. 22 depicts exemplary visual feedback features according to someembodiments of the present disclosure.

FIGS. 23A-23C depict a further exemplary delivery device according toaspects of the present disclosure.

FIGS. 24A-24E depict a further exemplary delivery device and method ofusing said delivery device, according to aspects of the presentdisclosure.

FIGS. 25A-25E depict a further exemplary delivery device and method ofusing said delivery device, according to aspects of the presentdisclosure.

FIGS. 26A-26G depict further exemplary delivery devices and a method ofusing one such delivery device, according to aspects of the presentdisclosure.

FIGS. 27A-27H depict a further exemplary delivery device and method ofusing said delivery device, according to aspects of the presentdisclosure.

FIGS. 28A-28Z depict further exemplary delivery devices and methods ofusing said delivery devices, according to aspects of the presentdisclosure.

FIGS. 29A-29C depict a further exemplary delivery device and method ofusing said delivery device, according to aspects of the presentdisclosure.

FIGS. 30-31 depict a further exemplary delivery device and method ofusing said delivery device, according to aspects of the presentdisclosure.

FIGS. 32-33 depict a further exemplary delivery device and method ofusing said delivery device, according to aspects of the presentdisclosure.

FIGS. 34-40C depict a further exemplary delivery device and method ofusing said delivery device, according to aspects of the presentdisclosure.

FIGS. 41A-41D depict exemplary flange pieces according to furtherembodiments of the present disclosure.

There are many embodiments described and illustrated herein. The presentdisclosure is neither limited to any single aspect nor embodimentthereof, nor to any combinations and/or permutations of such aspectsand/or embodiments. Each of the aspects of the present disclosure,and/or embodiments thereof, may be employed alone or in combination withone or more of the other aspects of the present disclosure and/orembodiments thereof. For the sake of brevity, many of those combinationsand permutations are not discussed separately herein.

DETAILED DESCRIPTION

Embodiments of the present disclosure may be used in addition to and/orin combination with aspects of International Application No.PCT/US2018/065192, filed Dec. 12, 2018, which in incorporated byreference in its entirety herein.

As used herein, the terms “comprises,” “comprising,” “includes,”“including,” or any other variation thereof, are intended to cover anon-exclusive inclusion, such that a process, method, article, orapparatus that comprises a list of elements does not include only thoseelements, but may include other elements not expressly listed orinherent to such process, method, article, or apparatus. The term“exemplary” is used in the sense of “example,” rather than “ideal.”Notably, an embodiment or implementation described herein as an“example” or “exemplary” is not to be construed as preferred oradvantageous, for example, over other embodiments or implementations;rather, it is intended reflect or indicate the embodiment(s) is/are one“example,” rather than “ideal.” In addition, the terms “first,”“second,” and the like, herein do not denote any order, quantity, orimportance, but rather are used to distinguish an element, a structure,a step or a process from another. Moreover, the terms “a” and “an”herein do not denote a limitation of quantity, but rather denote thepresence of one or more of the referenced items. Additionally, the terms“about,” “approximately,” “substantially,” and the like, when used indescribing a numerical value, denote a variation of +/−10% of thatvalue, unless specified otherwise.

Embodiments of the present disclosure may be used with any type offluid-containing products, such as liquid drug substances, liquidplacebos, or other liquids that may be dispensed in a dose form. As usedherein, the term “drug substance” may refer to a formulated substanceincluding an active ingredient or ingredients, such as, e.g., small orlarge molecules, such as pain medications, steroids, or biologics. Asused herein, the term “biologic” may refer to a large molecule (e.g.,having a size greater than 15 kDa, greater than 30 kDa, greater than 50kDa, greater than 75 kDa, or greater than 100 kDa) created in a livingsystem such as a cell. Biologics may include proteins (e.g.,antibodies), nucleic acids, large sugars, etc. Unlike small moleculesthat may have well-defined chemical structures, biologics may havehighly complex structures that cannot be easily quantified by laboratorymethods. As used herein, the term “drug product” may refer to a volumeof a drug substance apportioned into a primary packaging component forpackaging, transportation, delivery, and/or administration to a patient.

The term “primary packaging component” refers to a packaging componentfor a drug product, such as a drug container, that is designed andmanufactured to be in direct physical contact with the formulated drugsubstance. (See, for example, Guidance for Industry on Container ClosureSystems for Packaging Human Drugs and Biologics, U.S. Department ofHealth and Human Services, Food and Drug Administration, Center for DrugEvaluation and Research, and Center for Biologics Evaluation andResearch (May 1999), which is incorporated by reference herein.)Examples of primary packaging components include pre-fillable syringes,Luer syringes, cartridges, and vials made of glass, plastic, otherpolymers or co-polymers, and/or other materials.

As used herein, the terms “distal” and “distally” refer to a location(or portion of a device) relatively closer to, or in the direction of, apatient delivery site, and the terms “proximal” and “proximally” referto a location (or portion of a device) relatively closer to, or in thedirection of, a user end opposite a distal location/portion of a device.

As used herein, the term “body,” when used in reference to a part of adevice, may refer to a component of the device suitable for containing avolume of a drug substance. A body may include, e.g., a barrel (such asa syringe barrel), tube, cylinder, or other containing portion of adevice. In some embodiments, a body may also include a distal endportion having a nozzle, needle, needle attachment site, and/or distalcap.

Embodiments of the present disclosure may be used with productstypically having small dose volumes, such as, e.g., ophthalmic drugproducts. In some embodiments, devices of the present disclosure may beused with drug products including a large molecule, e.g., a molecularweight of 30 kDA or greater. In some embodiments, devices of the presentdisclosure may be used with drug products including a fragment of alarge molecule. For example, in some embodiments, devices of the presentdisclosure may be used with drug products including an antigen-bindingmolecule. In some aspects, the antigen-binding molecule may be anantibody or antigen-binding fragment. In some embodiments, devices ofthe present disclosure may be suitable for use with drug productsincluding ingredients such as, e.g., aflibercept, alirocumab, abiciparpegol, bevacizumab, brolucizumab, conbercept, dupilumab, evolocumab,tocilizumab, certolizumab, abatacept, rituximab, infliximab,ranibizumab, sarilumab, adalimumab, anakinra, trastuzumab,pegfilgrastim, interferon beta-1a, insulin glargine [rDNA origin],epoetin alpha, darbepoetin, filigrastim, golimumab, etanercept,antigen-binding fragments of any of the above, or combinations of suchbinding domains, such as a bispecific antibody to VEGF orangiopoietin-2, among others.

In some embodiments, devices and aspects of the present disclosure canbe used with any therapies for ophthalmic diseases, including for thetreatment of patients with Diabetic Eye Disease, post-injectionnoninfectious Endophthalmitis, Neovascular (Wet) Age-related MacularDegeneration (AMD), Macular Edema following Retinal Vein Occlusion(RVO), Diabetic Macular Edema (DME), and Diabetic Retinopathy (DR). Inparticular, large molecule and small molecule antagonists of VEGF and/orANG-2, such as aflibercept, ranibizumab, bevacizumab, conbercept,OPT-302, RTH258 (brolocizumab), abicipar pegol (a pegylated designedankyrin repeating protein (DARPin)), RG7716, or fragments thereof and inany concentration. Intravitreal (IVT) administration of therapeuticagents may be an effective treatment for such eye disorders (e.g.,macular degeneration, retinal vein occlusion, macular edema,retinopathy, etc.), however, IVT administration includes variouschallenges such as drug product development, administration procedureand adverse events. For example, providing accurate and precise deliveryof small volumes (10-100 μL) requires precise design of containercomponents. Accordingly, inaccuracies in a dosage delivery (e.g., overor under-dosing) may provide undesired adverse events or lack ofefficacy resulting in unpredictable and variable clinical responses.

In some embodiments, devices and aspects of the present disclosure mayprovide accurate dose delivery while also providing a container closuresystem for maintaining the agent in a sterile, stable, and safecondition to increase an intended shelf-life and efficacy of the agent.IVT drug products are primarily presented in glass vials, however,pre-filled syringes offer a more convenient administration by reducingthe number of steps required for dose preparation. Preassembling theagent in the devices of the present disclosure may minimize the stepsnecessary for preparing a dose for delivery to a patient. Productdevelopment studies may focus on primary container componentcharacterization, material compatibility with the formulation,formulation stability, fill volume determination, extractable/leachableand terminal sterilization.

Additionally, careful selection of ancillary components such asdisposable syringes and needles, and a detailed administration procedurethat includes dosing instructions can ensure successful administrationof the product. Despite significant efforts in improving the drugproduct and administration procedures, ocular safety concerns such asendophthalmitis, increased intraocular pressure and presence of siliconefloaters have been reported. Devices and aspects of the presentdisclosure may provide detailed administration procedures (e.g., priminginstructions, dosing instructions, etc.) to ensure successfuladministration of the agent to a patient to minimize such ocular safetyconcerns. In some embodiments, devices and aspects of the presentdisclosure can also be used for cosmetic applications or medicaldermatology, such as treatment or diagnosis of allergic responses.

In some embodiments, devices and aspects of the present disclosure canbe used to perform various eye injection procedures, such as, forexample, intraocular treatments and surgeries involving an intravitrealinjection of a drug product. Devices and aspects of the presentdisclosure may be used to dispense drug products of varying proteinconcentration and/or viscosity, including, for example, drug productshaving a viscosity ranging from about 1 centipoise to about 10centipoise, from about 2 centipose to about 9 centipose, from about 3centipose to about 8 centipose, from about 4 centipose to about 7centipose, or from about 5 centipose to about 6 centipose. Drug productshaving still other viscosities also are contemplated. Providing aprecise dose with a device of the present disclosure may be importantgiven a possible variability in protein concentration or viscosity of adrug product being delivered to a patient. Devices and aspects of thepresent disclosure may be further used to dispense varying volumesand/or quantities of a drug product, such as, for example, volumesranging from about 1 μL to about 200 μL, from about 10 μL to about 190μL, from about 50 μL to about 150 μL, from about 75 μL to about 125 μL,from about 90 μL to about 110 μL, or about 100 μL. Devices of thepresent disclosure may be configured and operable to require applicationof a minimum force exceeding a threshold for performing one or moreprocedures, such as, for example, priming a device, delivering a dosage,and the like. By requiring application of the minimum force, devices ofthe present disclosure may promote control in administering a consistentdose of a drug product, and promote safety by minimizing inadvertentmovement of the device's components, thereby potentially reducing pain,discomfort, and injury to a patient.

For some products in particular, e.g., ophthalmic or other drugproducts, dose accuracy may be particularly important. However, it isalso contemplated that embodiments of the present disclosure may beapplicable to any other liquid products or any other context for whichprecise methods for setting and administering a reliably accurate doseor delivery volume are beneficial.

In some embodiments, devices according to the present disclosure may bemanufactured, packaged, filled, and/or otherwise prepared according toprocesses relevant to the products (e.g., drug products) of which theymay be a part. For example, in some embodiments, devices according tothe present disclosure may be sterilized, either before or after beingfilled and/or packaged. For example, in some embodiments, devicesaccording to the present disclosure may be filled and packaged in, e.g.,blister packaging, and/or may be terminally sterilized using anysuitable method in the art. For example, devices according to thepresent disclosure may be terminally sterilized using a chemicalsterilization method, such as a method including ethylene oxide orhydrogen peroxide (e.g., vaporized hydrogen peroxide). In someembodiments, devices according to the present disclosure may beterminally sterilized using methods described in, e.g., InternationalApplication No. PCT/US2018/021013, filed Mar. 6, 2018, which isincorporated by reference herein in its entirety.

Dose delivery devices available on the market, such as pre-filledsyringes or syringes for use with vials, may not necessarily assist withaccurately loading a desired volume of a substance, priming the devices,expelling an excessive volume of drug substance from the devices, and/orremoving air bubbles from the devices. In dose delivery devicescontaining a small volume of a drug substance in particular (e.g., about500 μL or less, about 300 μL or less, about 250 μL or less, about 200 μLor less, about 150 μL or less, about 100 μL or less, about 50 μL orless, or about 25 μL or less, such as between about 25 μL and about 50μL, between about 50 μL and about 100 μL, between about 25 μL and about100 μL, between about 50 μL and about 150 μL, between about 100 μL andabout 250 μL, between about 100 μL and about 150 μL, between about 150μL and about 250 μL, between about 200 μL and about 250 μL, betweenabout 200 μL and about 500 μL, or between about 250 μL and about 500μL), it may also be difficult to confirm the presence of the correctdose of a drug substance in the device with the naked eye. Currently inthe dose delivery device market, and specifically in the syringe market,there is a need for mechanisms that allow a user to set precisely fordelivery a small volume of a product in a syringe (e.g., a pre-filled orfillable/refillable syringe), prime the syringe, remove air bubbles fromthe syringe, and/or confirm or be assured that the dose volume in thesyringe is correct. Embodiments of the present disclosure may assistmanufacturers, drug product providers, medical professionals, and/orpatients with accurately making, filling, or otherwise preparing a doseadministration device, priming the device, removing bubbles from thedevice, confirming the dose, and/or administering a dose from the deviceto a patient. Moreover, embodiments of the present disclosure may assistin preventing or mitigating errors or variation in device manufacture oruse, such as errors or variation in placement of dose lines on devices,variation in device geometry (e.g., variation in syringe neck geometry),variations in component manufacturing tolerance, and/or variation orerrors in setting a dose line prior to delivery of a product.

In some instances, embodiments of the present disclosure may be ofparticular assistance to individuals who may have difficulty settingdoses with precision and accuracy. For example, embodiments of thepresent disclosure may assist elderly individuals, young children, orpersons with physical or mental disabilities in setting accurate doses.

Described herein are various embodiments of dose delivery devices, andin particular, for syringes. In some instances, embodiments or aspectsof embodiments disclosed herein may be used in conjunction with existingsyringe body parts to modify off-the-shelf products, which may reducethe development and manufacturing time for the dose delivery devices. Inother instances, embodiments or aspects of embodiments disclosed hereinmay be included in devices during their manufacture. The syringesdescribed herein may be pre-filled or may be fillable/refillable.

Embodiments of the present disclosure may include syringes havingrotating parts, threaded parts, springs, gears, detents, channels,grooves, and the like, that may allow a user to precisely control themovement of priming and dosage delivery elements such as, e.g., plungersand/or stoppers. Such parts may be intended to reduce human error and/orincrease accuracy.

In some embodiments, visualization devices, such as magnifiers, may beprovided with, attached to, or otherwise disposed on, delivery devices,in order to help enhance visibility of dose measurement markers on thedevices. It is contemplated that aspects of one embodiment (such assleeves, channels, blocking components, protrusions, detents, threadedparts, grips, visual, tactile, or auditory indicators, etc.) may becombined with aspects of one or more other embodiments, to createvarious combinations and permutations of features in a single device.

In some embodiments, devices according to the present disclosure may bedepicted as including one type of plunger rod and plunger, or asincluding a general schematic representation of a plunger rod andplunger. For example, some devices according to the present disclosuremay be depicted or described as including, e.g., a plunger rod having aball-tipped end, which engages with a stopper such that the plunger rodand the stopper may be attached together. It is contemplated thatmultiple and/or different configurations of plunger rods and stoppersmay be appropriate for each of the embodiments disclosed herein. Forexample, in some cases, the aforementioned ball-tipped plunger rod maybe used with embodiments disclosed herein. In some embodiments, aplunger rod may not be affixed to a stopper, and instead may be disposednear, next to, or flush against a stopper such that pressure from theplunger rod towards the stopper may push the stopper, but withdrawal,twisting, or other movement of the plunger rod may not cause the stopperto likewise be withdrawn, twisted, or otherwise moved. As anotherexample, in some embodiments, a plunger rod may be affixed to a stopperby threads, a clip, or an adhesive, or may be of a single piece with astopper (e.g., may have been manufactured in a single mold with astopper).

In some embodiments, devices according to the present disclosure mayinclude various cosmetic features relevant to intended users of thedevices. For example, devices according to the present disclosure may bemanufactured and sold for use with pediatric, elderly, ordifferently-abled patients. In such cases, devices according to thepresent disclosure may include child-friendly coloring, cartoon images,or other cosmetic features to appeal to children, or high-contrastcoloring, textured surfaces, or other features to enhance ease ofidentification and/or use. In some cases, devices according to thepresent disclosure may include lettering, labeling, or other featuresdesigned to be easily recognized by the intended users. For example,lettering on a pediatric device or a device for use by a disabled ordifferently-abled person or an elderly person may have larger, moreaccessible labeling so that it may be more easily recognized and read bythe user(s) of the device. In some embodiments, lettering or labelingmay be raised, molded, or embossed.

Referring now to FIGS. 1A-1E, views of a delivery device 1050 andcomponent parts are depicted. Device 1050 includes a body 1060, and ablocking component in the form of a flange piece 1070 with a proximalcollar 1072 surrounding an opening 1073 (shown in, e.g., FIGS. 4B-4E),through which a plunger rod 1080 may pass into body 1060. Plunger rod1080 includes an actuation portion 1082 which may be actuated (e.g.,pushed or twisted) to rotate plunger rod 1080, or to move plunger rod1080 longitudinally into body 1060. Actuation portion 1082 may be sizedand configured to fit (e.g., nest or otherwise fit) inside proximalcollar 1072.

Device 1050 may be, for example, an injection device, such as a syringe,for dispensing a predetermined volume of a formulated drug substance. Insome embodiments, device 1050 may be a pre-filled syringe. For example,a user may receive an assembled and packaged device 1050 ready for use,with a volume of formulated drug substance already disposed between astopper 1062 in body 1060 and an expulsion end 1064 of body 1060. Insome embodiments, an air bubble (not shown) may also be disposed betweenstopper 1062 and expulsion end 1064. In further embodiments, device 1050may be a fillable syringe.

Body 1060 may be any suitable body configured for holding and expellinga predetermined volume of a formulated drug substance. In someembodiments, body 1060 may have, e.g., a hollow cylindrical portion.Body 1060 may be configured to hold any suitable volume of a formulateddrug substance for delivering to, e.g., a patient, and (together withother components of device 1050) to expel a predetermined amount of theheld volume through, e.g., expulsion end 1064 in a priming step and/ordelivery step. In some embodiments, body 1060 may be configured to holdand (together with other components of device 1050) expel a relativelysmall volume of formulated drug substance (e.g., less than about 100 μl,such as less than about 80 μl, less than about 60 μl, less than about 40μl, less than about 20 μl, less than about 10 μl, about 95 μl, about 90μl, about 85 μl, about 80 μl, about 75 μl, about 70 μl, about 65 μl,about 60 μl, about 55 μl, about 50 μl, about 45 μl, about 40 μl, about35 μl, about 30 μl, about 25 μl, about 20 μl, about 15 μl, about 10 μl,or about 5 μl). Device 1050, together with its other components, may befurther configured to minimize a residual volume of the formulated drugsubstance remaining in body 1060 after delivering the predeterminedsmall volume to the patient. In some embodiments, body 1060 may bepre-filled (e.g., prior to completed assembly, packaging, sterilizationand/or shipment of device 1050 to users). In some embodiments, stopper1062 may be configured to hold a predetermined volume of a formulateddrug substance inside a cavity of body 1060.

Flange piece 1070 may be of any suitable size and/or shape to serve as ablocking component in delivery device 1050, to close, partially close,cover, or partially cover an end of body 1060 opposite expulsion end1064, and/or to support and hold plunger rod 1080 in place inside body1060. In some embodiments, flange piece 1070 may include a distal collar1075 configured to engage with body 1060 and hold flange piece 1070 inplace in relation to body 1060. For example, distal collar 1075 mayinclude a lip 1071 that may slide under or otherwise in relation to abody flange 1061, to hold flange piece 1070 in place (e.g., to slidablycouple flange piece 1070 to body 1060). In alternative embodiments, lip1071 of distal collar 1075 may be made of a flexible or semi-flexiblematerial, so that it may snap in place over body flange 1061. In furtherembodiments, distal collar 1075 or another portion of flange piece 1070may be adhered to, molded to, or otherwise affixed to, body 1060, or mayengage with body 1060 via a friction fit.

Flange piece 1070 may be or include a blocking component; i.e., part orall of flange piece 1070 may be sized and configured to control movementof plunger rod 1080 by blocking movement of plunger rod 1080 whenplunger rod 1080 is in certain configurations relative to flange piece1070. For example, flange piece 1070 may be configured to controlrotational and longitudinal movement of plunger rod 1080, e.g., viaopening 1073 (see, e.g., FIGS. 4B-4E) that complements the size andshape of parts of plunger rod 1080 (e.g., neck 1084 and actuationportion 1082, and/or other portions of plunger rod 1080 as shown inFIGS. 4K-4O). As described in further detail herein, flange piece 1070may be formed of various materials having a minimum strength and/orrigidity which may provide further control of a rotational orlongitudinal movement of plunger rod 1080. For example, flange piece1070 may be configured to resist proximal movement (or “pull back”) ofplunger rod 1080 (e.g., to inhibit disassembly of device 1050 byretracting plunger rod 1080) up to a predetermined force based at leastin part on a material composition of flange piece 1070. It should beappreciated that flange piece 1070 may be configured such that applyinga force exceeding the predetermined force may cause one or more offlange piece 1070 and plunger rod 1080 to break, thereby renderingdevice 1050 inoperable.

By way of further example, flange piece 1070 may be configured to resistrotational movement of plunger rod 1080 (e.g., to inhibit inadvertentrotation) up to a predetermined force based at least in part on amaterial composition of flange piece 1070. Additionally and/oralternatively, flange piece 1070 may be configured to resist distalmovement of plunger rod 1080 to control a rate of dosage delivery (e.g.,to inhibit inadvertent delivery) based at least in part on a materialcomposition of flange piece 1070. Various other components of device1050 other than flange piece 1070 may include a material compositionproviding a frictional interference to inhibit disassembly of device1050, inadvertent rotation of plunger rod 1080, and/or inadvertentdosage delivery.

Proximal collar 1072 of flange piece 1070 may be sized and configured toaccept part of actuation portion 1082 of plunger rod 1080, whileblocking protrusions 1086 of plunger rod 1080 from moving distally pasta predetermined point until plunger rod 1080 is rotated to a particularposition. As shown in FIGS. 1A and 1B, collar 1072 may be cylindrical;in alternate embodiments, collar 1072 may have any suitable size orshape compatible with actuation portion 1082. Collar 1072 may alsoinclude cavities, e.g., slots 1074 into which protrusions 1086 ofplunger rod 1080 may be received. Slots 1074 may have proximally-facingopenings and may have a depth dimension parallel to a longitudinal axisof device 1050. A number and configuration of slots 1074 may correspondto a number and configuration of protrusions 1086 on plunger rod 1080.In some embodiments, slots 1074 may be disposed about a perimeter ofcollar 1072 in a radially symmetrical configuration. In furtherembodiments, collar 1072 may include only one slot 1074. The depth ofslots 1074 may correspond to a distance plunger rod 1080 must move inorder to push stopper 1062 towards expulsion end 1064, and dispense apredetermined volume of formulated drug substance from body 1060 throughexpulsion end 1064. Advantageously, the predetermined volume offormulated drug substance that is to be dispensed from body 1060 may becontrolled during manufacturing, by, e.g., selecting a particular depthof slots 1074. In some embodiments, device 1050 may be configured suchthat normal variations in manufacturing of other parts of device 1050(e.g., body 1060 or plunger rod 1080) may not cause variations in thevolume of formulated drug substance that is to be dispensed from body1060. As such, the predetermined volume may be controlled by simplyvarying manufacture of flange piece 1070.

In some embodiments, flange piece 1070 may include one or more flanges1076, which may be sized and configured to aid a user in holding device1050 and/or expelling a formulated drug substance from device 1050. Insome embodiments, as depicted in FIGS. 1A-1E, flange piece 1070 mayinclude two flanges 1076 opposite to one another and extendingperpendicularly from a longitudinal dimension of device 1050. In someembodiments, flange piece 1070 may include other arrangements of aflange or flanges, such as four flanges, or one circumferential flangeextending radially outward from a central longitudinal axis of device1050. In some embodiments, flange piece 1070 may extend radially outwardfrom a central longitudinal axis of device 1050 farther than acircumference of body 1060. In such embodiments, flange piece 1070 maysupport device 1050 if device 1050 is placed on a surface, may preventdevice 1050 from rolling on a flat surface, and/or may allow device 1050to be picked up more easily. In still further embodiments, blockingcomponent aspects of flange piece 1070 (e.g., collar 1072) may beseparate from flange piece 1070, such that delivery device 1050 includesa separate flange piece and blocking component.

Plunger rod 1080 in general may be rotatable about a centrallongitudinal axis (e.g., in one direction or in both directions). Insome embodiments, rotation of plunger rod 1080 may be accomplished bygrasping and/or twisting actuation portion 1082 relative to flange piece1070 and/or body 1060. In some embodiments, protrusions 1086 may assista user in grasping and/or twisting actuation portion 1082 relative toflange piece 1070 and/or body 1060, by providing additional surface areathat a user may grasp and/or push against to twist actuation portion1082. In some embodiments, only a part or parts of plunger rod 1080(e.g., actuation portion 1082 and/or a neck 1084) may be rotatablerelative to flange piece 1070 and/or body 1060. In some embodiments,plunger rod 1080 may be configured to rotate relative to flange piece1070 in response to applying a predetermined twisting force ontoactuation portion 1082. A material composition of flange piece 1070 maybe determinative of the predetermined twisting force required to rotateplunger rod 1080 relative to flange piece 1070. For example, flangepiece 1070 may be formed of various materials having a predeterminedrigidity that may generate frictional resistance against plunger rod1080 to control rotational movement of plunger rod 1080 up to thepredetermined force (e.g., to inhibit inadvertent rotation/accidentaltwisting of plunger rod 1080). Further, a material composition of flangepiece 1070 may provide a frictional tolerance to control a distaltranslation of plunger rod 1080 up to a predetermined force (e.g., toinhibit inadvertent dosage delivery by device 1050).

A stem 1081 of plunger rod 1080 may have any thickness andcross-sectional shape suitable for fitting into body 1060, whilemaintaining sturdiness. For example, in some embodiments, stem 1081 mayhave as great a thickness, along at least one dimension, as can fit andslide into body 1060. Advantageously, such a thickness may help inpreventing unwanted wobbling of plunger rod 1080 relative to the othercomponents of device 1050. In further embodiments, stem 1081 may have asmaller thickness while still maintaining sturdiness (e.g., not bending,breaking, or warping during assembly and/or use of device 1050). In someembodiments, portions of stem 1081 may be configured to allow forplunger rod 1080 to rotate relative to flange piece 1070, whereas otherportions of stem 1081 may not (see, e.g., FIGS. 4K-4S).

Plunger rod 1080 may also include a distal tip 1083 (see, e.g., FIG. 1D)sized and configured to push, attach to, or otherwise interface withstopper 1062. Tip 1083 may have any size or shape suitable to achievethis purpose. In some embodiments, for example, tip 1083 may be sizedand configured to clip to stopper 1062 via an opening in stopper 1062.In further embodiments, tip 1083 may have a ball-shape configured to fitinto an opening in stopper 1062. In yet further embodiments, tip 1083may present a flat surface parallel to a proximal surface of stopper1062, and may be configured to push stopper 1062 distally withoutattaching to stopper 1062. In further embodiments, tip 1083 may have anyshaped surface suitable for pushing stopper 1062 distally.

In some embodiments, neck 1084 of plunger rod 1080 and opening 1073 offlange piece 1070 may have complementary geometries that restrict theextent and direction that plunger rod 1080 (or a part thereof) mayrotate, depending on the specific longitudinal and/or rotationalposition of plunger rod 1080 relative to flange piece 1070. In someembodiments, actuation portion 1082 of plunger rod 1080 and collar 1072may also include complementary geometries that control the extent anddirection that plunger rod 1080 may move relative to flange piece 1070.For example, rotation and/or longitudinal movement of plunger rod 1080may be restricted based on priming, preparing, and/or drug deliverysteps of a method of using device 1050 (see, e.g., the method describedwith respect to FIGS. 4A-4F and the additional/alternative methoddescribed with respect to FIGS. 4G-4H and 4I-4J), and the correspondingposition of plunger rod 1080 with respect to each step in such methods.For example, plunger rod 1080 may be restricted from being moved out offlange piece 1070 in a proximal direction (e.g., falling out or beingpulled out) once device 1050 is assembled. Moreover, plunger rod 1080may be restricted from rotation about a longitudinal axis before device1050 is in a “primed” state, and/or after device 1050 is in a “delivery”state. Additionally, longitudinal movement of plunger rod 1080 in theproximal direction (e.g., to “back out” plunger rod 1080), may berestricted after device 1050 is in a “primed” and/or “delivery” state bycomplementary geometries of neck 1084 of plunger rod 1080 and opening1073 of flange piece 1070 and/or of actuation portion 1082 of plungerrod 1080 and collar 1072 of flange piece 1070. Advantageously, this mayprevent unwanted plunger rod back out in cases where plunger rod 1080 isnot held inside body 1060 by, e.g., being affixed to stopper 1062. Forexample, in some embodiments, plunger rod 1080 may be configured tosimply contact or rest against stopper 1062, such that proximal movementof plunger rod 1080 does not move stopper 1062 proximally. In suchcases, proximal movement of plunger rod 1080 may be prevented byinteraction between complementary geometries of plunger rod 1080 andflange piece 1070. Moreover, interaction between actuation portion 1082of plunger rod 1080 and collar 1072 of flange piece 1070 may restrictlongitudinal movement of plunger rod 1080 in a distal direction. As anexample, plunger rod 1080 may be restricted from moving distally afterthe “primed” state but before the “delivery” state.

Upon being moved to the “delivery” state, protrusions 1086 on actuationportion 1082 may be longitudinally aligned with slots 1074 of collar1072, allowing for distal movement of plunger rod 1080 to dispense adesired volume of a drug substance from body 1060. As such, plunger rod1080 may include a number and configuration of protrusions 1086 suchthat each protrusion 1086 may move distally into a slot 1074 whenplunger rod 1080 is in a particular position (e.g., a “delivery” state).In some embodiments, one, two, three, or more protrusions 1086 mayextend from actuation portion 1082, corresponding to one, two, three, ormore slots 1074, respectively. For example, as depicted, two protrusions1086 may extend from the sides of actuation portion 1082 in a radiallysymmetrical configuration (corresponding to two slots 1074 in collar1072). In some embodiments, radial symmetry of multiple protrusions 1086(and slots 1074) may advantageously allow for protrusions 1086 to fitinto slots 1074 in multiple configurations (e.g., depending on whetheractuation portion 1082 is twisted in one direction or another). In suchembodiments, actuation portion 1082 may be twisted in either directionbased on, e.g., user preference, right-handedness or left-handedness, orother factors. In some embodiments, plunger rod 1080 may not be pulledproximally or backed out of body 1060 (e.g., towards actuation portion1082) after plunger rod 1080 is in a “primed” state and/or after adesired volume of formulated drug substance has been delivered fromdevice 1050 by depression of plunger rod 1080 into body 1060 (e.g., dueto a geometry of neck 1084 and/or opening 1073).

In some embodiments, device 1050 may be configured for ease of use, andmay include one or more features that aid a user by providing tactile orvisual feedback. For example, one, two, or more components of device1050 may have contrasting colors or textures. In some embodiments, forexample, flange piece 1070 may have a different coloring than plungerrod 1080. As a further example, a single component of device 1050 mayhave two or more colors or textures. In some embodiments, for example,actuation portion 1082 may include a first color on a distal part ofactuation portion 1082, that becomes covered by collar 1072 when device1050 is primed, and a second color on a second portion of actuationportion 1082, that moves adjacent to collar 1072 when device 1050 isprimed, to help indicate to a user that device 1050 has been properlyprimed. As a further example, in some embodiments, flange piece 1070 mayhave a different tactile feel than plunger rod 1080 and/or body 1060.For example, flange piece 1070 may be relatively rougher or smootherthan plunger rod 1080 and/or body 1060. As yet another example, one ormore components of device 1050 may have textures that aid in holding,gripping, identifying, or using device 1050. For example, flange piece1070 may have a slightly rough or raised texture to aid a user ingripping flanges 1076, and/or to prevent a user's fingers from slippingoff of the flanges 1076 during use. In some embodiments, some or all offlange piece 1070 may have a smooth-feeling surface. As another example,actuation portion 1082 of plunger rod 1080 may include a rough or raisedtexture to aid in gripping and rotating plunger rod 1080. For example,as depicted in FIGS. 1A-1I, 3A-3C, 3E, and 4A-4I, actuation portion 1082may include circumferential ribbing on its side(s). Actuation portion1082 may have any suitable number of ribs on its side(s) to providetexture. In further embodiments, actuation portion 1082 may have noribbing on its side(s).

In some embodiments, device 1050 or one or more of its components mayinclude colors, labels or markers, which may indicate contents or astatus of device 1050, and/or which may direct or provide instructionsto a user of device 1050. Examples include one or more labels toindicate a priming position versus a dosage delivery position of theplunger rod, one or more labels to indicate directions in which torotate or otherwise move plunger rod 1080, and/or one or more labels toindicate an amount of formulated drug substance included in device 1050(e.g., linear markings on body 1060). Labels may be, e.g., adhered orprinted on components of device 1050, or may be embossed on, or moldedas a part of, components of device 1050. In some embodiments, one ormore textured labels (e.g., embossed or molded on device 1050) may alsoserve as a textured, rough, or raised surface to aid a user in grippingor using device 1050. One or more exemplary labels may include words,numerals, indicators, and/or symbols (e.g., lines, padlocks, arrows,diagrams, etc.).

In some embodiments, device 1050 may be configured to make one or moresounds during its use. For example, device 1050 may make a “clicking”noise upon completion of a priming step, or upon rotation of the plungerrod to a position suitable for dispensing a predetermined volume of aformulated drug substance. A “clicking” noise may be produced by, e.g.,friction between two or more components (e.g., plunger rod 1080 andflange piece 1070), or a portion of one component contacting anotherportion (e.g., neck 1084 of plunger rod 1080 contacting opening 1073 offlange piece 1070). In some embodiments, device 1050 may include one ormore detents or protrusions on adjacent surfaces of, e.g., plunger rod1080 and flange piece 1070, which may produce a clicking sound whencontacting one another (e.g., wings 1089 on neck 1084 contacting detents1078 surrounding opening 1073, as shown in FIGS. 4T-4X). Such sounds mayserve as auditory feedback to indicate that a user has reached aparticular step in the use of device 1050.

In some embodiments, device 1050 may include additional features orcomponents to control movement of plunger rod 1080 relative to body1060. For example, as shown in FIG. 1F, flange piece 1070 may include anopening 1079 through which a pin 1077 may be disposed. Pin 1077 may besized and configured to interface with actuation portion 1082 of plungerrod 1080 (e.g., to slide into an opening (not shown) in actuationportion 1082), such that when pin 1077 is inserted so as to engageactuation portion 1082, plunger rod 1080 may not be moved proximally ordistally relative to body 1060 and flange piece 1070. In someembodiments, pin 1077 may also prevent rotational movement of plungerrod 1080 relative to flange piece 1070. Pin 1077 may be inserted uponfilling and assembly of a device (e.g., device 1050 shown in FIGS. 1Aand 1B), to prevent unwanted movement of plunger rod 1080 prior to itsuse. In some embodiments, pin 1077 may remain inserted during packaging,transportation, and delivery of device 1050. Before use of device 1050,pin 1077 may be removed or otherwise positioned so that it does notengage actuation portion 1082.

As shown in FIGS. 1G and 1H, in some embodiments, a protrusion 1093 maybe disposed at a distal portion of actuation portion 1082, which may belocated inside flange piece 1070 upon assembly of device 1050. An inwardlip 1091 of flange piece 1070 may overhang protrusion 1093, such thatactuation portion 1082 may not be pulled proximally out of flange piece1070. In some embodiments, either protrusion 1093, lip 1091, or both maybe disposed circumferentially about actuation portion 1082, such thatlip 1091 blocks protrusion 1093 regardless of a rotational position ofactuation portion 1082 relative to flange piece 1070. Protrusion 1093and lip 1091 may have squared-off cross-sectional profiles, as shown inFIG. 1G, angled cross-sectional profiles, as shown in FIG. 1H, or anyother suitable cross-sectional profiles. In some embodiments, across-sectional profile of protrusion 1093, lip 1091, or both may beselected to improve ease of manufacturing (e.g., machining or moldingthe shape of protrusion 1093 or lip 1091), or may be selected to improveassembly (e.g., insertion of plunger rod 1080 into and partially throughflange piece 1070).

As shown in FIG. 1I, in some embodiments, actuation portion 1082 mayinclude one or more projections 1096 extending radially outward from anexterior perimeter of protrusion 1093. For example, protrusion 1093 mayinclude a pair of projections 1096 disposed about protrusion 1093 atopposite locations relative to one another. Projections 1096 may includevarious suitable sizes, shapes, and/or cross-sectional profiles. In someembodiments, projections 1096 may have a circular shape with a roundedexterior profile to facilitate movement of protrusion 1093 within flangepiece 1070.

In the present example, projections 1096 may be positioned along a sideof protrusion 1093 that longitudinally aligned with a corresponding sideof actuation portion 1082 including protrusions 1086. In other examples,projections 1096 may be positioned along a side of protrusion 1093 thatis offset (e.g., not in longitudinal alignment) with the side ofactuation portion 1093 including protrusions 1086. Projections 1096 maybe formed of various flexible materials, including, for example, apolymer such as plastic, rubber, etc. It should be appreciated thatplunger rod 1080 may include additional and/or fewer projections 1096 onprotrusion 1093, or other portions of actuation portion 1082, than thoseshown and described herein without departing from a scope of thisdisclosure.

FIG. 1J depicts a distal end portion of flange piece 1070 including oneor more recesses 1097 along an interior surface. Recesses 1097 may besized and shaped to receive projections 1096 when protrusion 1093 isreceived within flange piece 1070 and positioned adjacent and/or incontact with lip 1091. It should be appreciated that lip 1091 may beconfigured to require application of a hydrodynamic force onto plungerrod 1080 to receive projections 1096 and protrusion 1093 distally of lip1091 and into flange piece 1070, thereby priming device 1050 andinhibiting retraction (e.g., proximal movement) of plunger rod 1080relative to flange piece 1070. It should be appreciated that byinhibiting removal of plunger rod 1080 after an initial assembly intoflange piece 1070, device 1050 may be configured to prevent reuse ofdevice 1050 after an initial use, and/or to prevent inadvertent airintake forming bubbles within device 1050. In the present example,flange piece 1070 may include a plurality of recesses 1097 disposedabout the distal end portion in an annular array relative to oneanother. The plurality of recesses 1097 may be spaced apart from oneanother about a circumference of flange piece 1070. In some embodiments,flange piece 1070 may include recesses 1097 having varying sizes and/orshapes relative to one another.

As described in further detail below, a subset of the plurality ofrecesses 1097 may be sized and shaped to receive and allow passage ofprojections 1096 therethrough upon movement of protrusion 1093 relativeto flange piece 1070. A second subset of the plurality of recesses 1097may be sized and shaped to receive and inhibit passage of projections1096 therethrough such that protrusion 1093 is restricted from furthermovement relative to flange piece 1070, as explained in further detailbelow.

For example, as shown in FIG. 1K, flange piece 1070 includes a pair ofwidened recesses 1097 a positioned about opening 1073 (with plunger rod1080 received therethrough) at opposite locations relative to oneanother (e.g., spaced about 180 degrees apart from one another). Flangepiece 1070 further includes a pair of narrowed recesses 1097 bpositioned about opening 1073 at opposite locations relative to oneanother (e.g., about 180 degrees from one another). A recess 1097 a maybe positioned about 90 degrees apart from an adjacent recess 1097 b,along the circumference of flange piece 1070. Widened recesses 1097 amay include a center wall transverse (e.g., perpendicular) to alongitudinal length of flanges 1076 and sidewalls that are angledrelative to the center wall. Narrowed recesses 1097 b may include acenter wall parallel to the longitudinal length of flanges 1076 andsidewalls that are perpendicular to the center wall. It should beappreciated that widened recesses 1097 a may form a larger opening forreceiving projections 1096 relative to narrowed recesses 1097 b. Itshould further be understood that sidewalls of recesses 1097 a, 1097 bmay have a height that is parallel to a longitudinal length of device1050.

In a first configuration seen in FIG. 1K, plunger rod 1080 is receivedthrough flange piece 1070 and protrusion 1093 is oriented relative toopening 1073 such that projections 1096 are received within widenedrecesses 1097 a. The angled sidewalls of widened recesses 1097 a mayprovide clearance to facilitate movement of projections 1096 out ofwidened recesses 1097 a in response to a rotation of plunger rod 1080relative to flange piece 1070. In this instance, projections 1096 maymove along the angled sidewalls of widened recesses 1097 a as protrusion1093 rotates relative to opening 1073.

As seen in FIG. 1L, projections 1096 may abut against the interiorsurface of flange piece 1070 defining opening 1073 as protrusion 1093rotates. Projections 1096 may generate a frictional interference againstflange piece 1070 while moving between adjacent recesses 1097. FIG. 1Mshows protrusion 1093 positioned relative to opening 1073 withprojections 1096 aligned with and received in narrowed recesses 1097 b.In this instance, plunger rod 1080 may be configured to generate anaudible and/or tactile feedback in response to narrowed recesses 1097 breceiving projections 1096. For example, a “click” or “snap” noise maybe generated in response to a release of pressure applied to projections1096 by the interior surface of flange piece 1070 when projections 1096are received in narrowed recesses 1097 b. Additionally and/oralternatively, an audible feedback may be produced in response toprojections 1096 expanding and striking one or more walls definingnarrowed recesses 1097 b when received therein.

It should be appreciated that a frictional interference betweenprojections 1096 and flange piece 1070 may be removed upon receipt ofprojections 1096 within narrowed recesses 1097 b. The sidewalls ofnarrowed recesses 1097 b may provide a physical restriction thatinhibits further movement of projections 1096. In this instance, plungerrod 1080 may be fixed relative to flange piece 1070 such that protrusion1093 is inhibited from further rotation relative to opening 1073 whenprojections 1096 are received within narrowed recesses 1097 b.

As shown in FIGS. 1N-1P, in some embodiments, plunger rod 1080 mayadditionally or alternatively include a protrusion 1085 on stem 1081,which may be configured to interact with opening 1073 of flange piece1070, such that protrusion 1085 may only move distally through opening1073. A side 1092 of opening 1073 may be angled to allow for distalpassage of protrusion 1085, and to block proximal passage of protrusion1085, as stem 1081 moves through opening 1073. Protrusion 1085 and/orside 1092 may have any suitable shape or configuration to achieve thispurpose. In some embodiments, a shape or configuration of protrusion1085 and/or side 1092 may be selected to improve ease of manufacturing(e.g., machining or molding the shape of protrusion 1085 and/or flangepiece 1070).

In other embodiments, flange piece 1070 may include a movable lever 1071a as seen in FIGS. 1Q-1T. Movable lever 1071 a may include a first end1071 b extending outwardly from collar 1072 and a second end 1071 cdisposed within collar 1072. Movable lever 1071 a may be movable (e.g.,pivotable) about a rotation pin 1071 d. Second end 1071 c may bepositioned within opening 1073 such that movable lever 1071 a isconfigured to interact with protrusion 1085 upon receipt of plunger rod1080 in flange piece 1070. Referring initially to FIG. 1Q, plunger rod1080 may be configured to prime device 1050 by translating stem 1081distally through flange piece 1070 until encountering movable lever 1071a.

As seen in FIG. 1R, second end 1071 c may abut against protrusion 1085when movable lever 1071 a is in an obstructing position. Second end 1071c may be configured to inhibit translation of plunger rod 1080 relativeto flange piece 1070 when plunger rod 1080 is in a primed position. Itshould be appreciated that a distance between second end 1071 c andprotrusion 1085 may define a priming distance for moving plunger rod1080 to prime device 1050. Movable lever 1071 a may be configured tomove (e.g., pivot) relative to collar 1072 and about rotation pin 1071 dto displace second end 1071 c from the obstruction position. Thepivoting axis, along which rotation pin 1071 d extends, may besubstantially perpendicular to the longitudinal axis along which plungerrod 1080 extends.

For example, as seen in FIG. 1S, movable lever 1071 a may be actuated inresponse to moving first end 1071 b distally toward flange 1076 andabout rotation pin 1071 d. In some embodiments, first end 1071 b may beactuated in response to receiving a distally-directed force appliedthereto by, for example, a user of device 1050. Second end 1071 c may bemoved in a proximal direction away from flange 1076 and relative torotation pin 1071 d in response to first end 1071 b moving distally,thereby causing second end 1071 c to disengage protrusion 1085.

Accordingly, as shown in FIG. 1T, movable lever 1071 a may allow plungerrod 1080 to translate relative to flange piece 1070 until protrusion1085 encounters an abutment 1072 a positioned at a distal end of opening1073. Abutment 1072 a may cause plunger rod 1080 to settle into a dosecompletion position of plunger rod 1080 when protrusion 1085 is engagedthereto. It should be appreciated that a distance between second end1071 c and abutment 1072 a may define a dosage delivery distance formoving plunger rod 1080 to dispense a controlled volume of substancefrom device 1050.

As shown in FIGS. 1U and 1V, in some embodiments, actuation portion 1082of plunger rod 1080 may additionally or alternatively include one ormore extensions 1087 configured to interface with side openings 1094,1095 in collar 1072 of flange piece 1070. Extensions 1087 may extenddistally from actuation portion 1082, and may have an angled or roundeddistal portion sized and configured to be pushed inward toward a centralaxis of plunger rod 1080 when actuation portion 1082 is pushed distallyinto collar 1072. The angled or rounded distal portion of each extension1087 may include a hook or clip shaped part 1087 a. Extensions 1087 mayadditionally be made of a flexible material, allowing them to be pushedinward into collar 1072 and spring back outwards when no longer beingrestricted by a side of collar 1072. Side openings 1094, 1095 in collar1072 may be sized and configured to receive hook or clip shaped part1087 a of an extension 1087, such that once an extension 1087 reaches aside opening 1094 or 1095, a hook or clip shaped part 1087 a may springoutward into the side opening 1094 or 1095 and thereafter preventproximal movement of plunger rod 1080. A number of extensions 1087 maycoincide with a number of each of side openings 1094 and side openings1095, such that each extension 1087 may be received in a correspondingside opening 1094 or 1095 simultaneously as plunger rod 1080 movesdistally relative to flange piece 1070.

Specifically, first side openings 1094 may be configured to receive hookor clip shaped parts 1087 a of extensions 1087 upon assembly of device1050, to prevent proximal movement of plunger rod 1080 once plunger rod1080 is inserted to a ready-to-use position. As hook or clip shaped part1087 a of each extension 1087 is received in first side openings 1094,it may make a “clicking” sound as it interfaces with collar 1072,thereby providing auditory and/or tactile feedback, indicating that thedevice is in a ready-to-use position. In some embodiments, first sideopenings 1094 may each extend around a partial circumference of collar1072, such that the hook or clip shaped parts 1087 a of extensions 1087may be received in side openings 1094 in a range of rotational positionsof plunger rod 1080 relative to flange piece 1070. Second side openings1095 may be configured to receive hook or clip shaped parts 1087 a ofextensions 1087 once device 1050 is in a “delivery” configuration (e.g.,after priming and additional rotation of actuation portion 1082 to alignprotrusions 1086 with slots 1074). In the embodiment depicted in FIGS.1U and 1V, extensions 1087 are longitudinally aligned with protrusions1086, and, as depicted in FIGS. 3C-3F, side openings 1095 are likewiselongitudinally aligned with slots 1074, to allow for distal movement ofactuation portion 1082 further into collar 1072 when device is in the“delivery” configuration. It should be appreciated that device may betransitioned to the “delivery” configuration in response to applying adistally-directed force onto actuation portion 1082, to overcome anengagement of side openings 1094 with extensions 1087, and a rotativeforce to overcome a frictional force between an interior of collar 1072and extensions 1087. However, in other embodiments, it is contemplatedthat extensions 1087 and side openings 1094, 1095 may be in any suitablecomplementary configuration to assist in controlling proximal movementof plunger rod 1080.

In other embodiments, as shown in FIG. 1W, side openings 1094 may bepositioned along collar 1072 in longitudinal alignment with sideopenings 1095. Device 1050 may be primed upon receiving hook or clipshaped parts 1087 a of extensions 1087, initially positioned proximallyof side openings 1094, within side openings 1094. In some instances, afeedback (e.g., tactile, auditory, etc.) may be generated in response toextensions 1087 being received within side openings 1094. It should beunderstood that a proximal end of collar 1072 may resist distaladvancement of plunger rod 1080 relative to flange piece 1070 inresponse to hook or clip shaped parts 1087 a being engaged to collar1072 at side openings 1094. Applying a distally-directed force ontoplunger rod 1080 may cause extensions 1087 to be released from sideopenings 1094 and translated distally through collar 1072 until receivedwithin side openings 1095.

It should be appreciated that the distally-directed force required todeflect extensions 1087 inwardly and to release hook or clip shapedparts 1087 a from side openings 1094 may correspond to a minimum primingand hydrodynamic force. Accordingly, plunger rod 1080 may be maintainedin a constant radial orientation during a priming step and delivery stepof device 1050. In other embodiments, additional and/or fewer sideopenings may be included along a circumferential wall of collar 1072 inlongitudinal alignment and/or offset (e.g., not longitudinally aligned)with side openings 1094, 1095.

As seen in FIG. 1X, flange piece 1070 may alternatively include one ormore inner projections 1095′ in lieu of side openings 1095 shown anddescribed above. In this instance, plunger rod 1080 may be preassembledinto flange piece 1070 with extensions 1087 (FIG. 1V) squeezed intocollar 1072 and positioned relatively proximal to side openings 1094.Device 1050 may be primed by pushing plunger rod 1080 distally throughflange piece 1070 until extensions 1087 are received within sideopenings 1094. In some instances, a feedback (e.g., tactile, auditory,etc.) may be generated in response to extensions 1087 being receivedwithin side openings 1095. In further embodiments, side openings 1094may be flared and/or extensions 1087 may have a distally-taperingprofile to facilitate further distal advancement of plunger rod 1080from a primed position to a dose completion position.

Further translation of plunger rod 1080 relative to flange piece 1070may cause extensions 1087 to bend radially-inward toward one another,thereby allowing plunger rod 1080 to translate distally to deliver adose from device 1050. Plunger rod 1080 may continue to translatedistally relative to collar 1072 until hook or clip shaped parts 1087 a(FIG. 1V) encounter inner projections 1095′. Inner projections 1095′ maybe configured to contact extensions 1087 and fix plunger rod 1080 to thedose completion position, and/or prevent further distal movement ofplunger rod 1080 relative to flange piece 1070. Accordingly, furthermovement (e.g., proximal and/or distal) of plunger rod 1080 relative toflange piece 1070 may be inhibited by inner projections 1095′ engaginghook or clip shaped parts 1087 a within collar 1072. Inner projections1095′ may include complimentary hooks or clip-shaped parts that aresized and/or shaped to interact with hook or clip shaped parts 1087 a orextensions 1087. It should be appreciated that a distance between sideopenings 1094 and inner projections 1095′ may define a dosage deliverydistance to dispense a controlled volume of substance from device 1050.

In other embodiments, as shown in FIGS. 2A-2C, flange piece 1070 mayinclude a fixed sleeve 1072P extending proximally from collar 1072.Fixed sleeve 1072P may have a circular cross-section defining an innerchannel with an opening at each terminal end of the fixed sleeve 1072P.The inner channel of fixed sleeve 1072P may extend through alongitudinal length of fixed sleeve 1072P and may be longitudinallyaligned with opening 1073 (FIG. 10) such that a respective longitudinalaxis of the inner channel and opening 1073 are coaxial with one another.Fixed sleeve 1072P may be sized, shaped, and configured to receive stem1081. In some embodiments, fixed sleeve 1072P may be integral withcollar 1072, while in other embodiments fixed sleeve 1072P may be aseparate component assembled onto flange piece 1070.

Fixed sleeve 1072P may include a plurality of openings that are sizedand shaped to receive protrusion 1085. For example, fixed sleeve 1072Pmay include a pair of proximal openings 1072Q and a pair of distalopenings 1072R longitudinally spaced apart from one another by an offsetdistance. Further, the pair of proximal openings 1072Q are located atthe same longitudinal position as one another, and the pair of distalopenings 1072R are located at the same longitudinal position as oneanother. As described in further detail below, the longitudinal offsetbetween proximal openings 1072Q and distal openings 1072R may define adosage delivery distance for moving plunger rod 1080 to dispense acontrolled volume of substance from device 1050. Alternatively, thelongitudinal offset between openings 1072Q, 1072R may define a primingdistance of device 1050 such that protrusion 1085 may be initiallyreceived within proximal openings 1072Q during an assembly of device1050 to inhibit proximal retraction of plunger rod 1080. In thisinstance, a dosage delivery distance may correspond to a longitudinaloffset between a distal end of actuation portion 1082 and a bottomsurface of collar 1072 when protrusion 1085 is received within distalopening 1072R. Although not shown, it should be appreciated that anadditional set of openings may be included on fixed sleeve 1072P (e.g.,proximal of proximal openings 1072Q, distal of proximal openings 1072Q,and/or distal of distal openings 1072R) to further define a primingdistance and/or dosage delivery distance.

A proximal end of fixed sleeve 1072P may include an angled interface1071P defining a proximal opening of fixed sleeve 1072P. Angledinterface 1071P may be tapered radially-inward toward the inner channelof fixed sleeve 1072P and configured to guide stem 1081 and protrusion1085 into the inner channel. In the present example, protrusion 1085 mayextend radially outward from stem 1081 in opposing lateral directionsand may be compressible and/or formed of a flexible/deformable material,such that protrusion 1085 is configured to retract or deform radiallyinward into and/or toward stem 1081 in response to a force being appliedthereto. In other embodiments, protrusion 1085 may be configured to atleast partially deform fixed sleeve 1072P to facilitate movement ofprotrusion 1085 toward and/or between openings 1072Q, 1072R. In thisinstance, fixed sleeve 1072P may be formed of a flexible materialoperable to flex radially-outward when applying a distally-directedforce onto stem 1081, thereby causing protrusion 1085 to apply a radialforce onto fixed sleeve 1072P.

Still referring to FIG. 2A, fixed sleeve 1072P may be configured toreceive plunger rod 1080 through the inner channel and allow stem 1081to pass through collar 1072 to prime device 1050. Protrusion 1085 may bereceived within fixed sleeve 1072P in response to encountering angledsurface 1071P and compressing radially inward relative to stem 1081until plunger rod 1080 is moved distally enough so that protrusion 1085is received by proximal openings 1072Q. As shown in FIG. 2B, protrusion1085 may be configured to expand radially outward (decompress) whenlongitudinally aligned with proximal openings 1072Q to lock stem 1081relative to flange piece 1070. In this instance, device 1050 may be in aprimed position such that further translation of stem 1081 distallyrelative to fixed sleeve 1072P and flange piece 1070 may deliver a dosefrom device 1050. Alternatively, device 1050 may be preassembled withprotrusion 1085 received in proximal openings 1072Q such thattranslation of stem 1081 distally relative to fixed sleeve 1072P mayprime device 1050 until protrusion 1085 is received within distalopenings 1072R.

As seen in FIG. 2C, while protrusion 1085 is positioned within proximalopenings 1072Q applying a distally-directed force onto stem 1081 maycause fixed sleeve 1072P to compress (or deform) protrusion 1085radially inward, thereby allowing stem 1081 to translate distallyrelative to fixed sleeve 1072P. Alternatively, protrusion 1085 may bemanually compressed (or deformed) by applying a radially inward-directedforce through proximal openings 1072Q. Protrusion 1085 may move distallythrough an inner channel of fixed sleeve 1072P and may be received bydistal openings 1072R. As stem 1081 translates distally relative tocollar 1072, device 1050 may transition from the primed position to adose completion position when protrusions 1085 are received withindistal openings 1072R, thus delivering the dose.

It should be appreciated that a volume of the dose delivered by device1050 may be controlled based on the longitudinal offset distance betweenproximal openings 1072Q and distal openings 1072R. In some embodiments,fixed sleeve 1072P may include additional openings for receivingprotrusion 1085 after priming and delivering a dose to inhibit proximalretraction of stem 1081 (e.g., pull back of plunger rod 1080) relativeto flange piece 1070. For example, protrusion 1085 may be receivedwithin proximal openings 1072Q during an assembly of device 1050 at amanufacturing stage such that distal openings 1072R may define a primingposition and a third set of openings (not shown) distal to distalopening 1072R may define a dosage delivery position. Alternatively, abottom, interior surface of flange piece 1070 distal to distal opening1072R may define the dosage delivery position of plunger rod 1080.

In some embodiments, as seen in FIGS. 2D-2G, flange piece 1070 mayinclude a movable sleeve 1072S extending distally and proximally fromcollar 1072. Movable sleeve 1072S may have a circular cross-sectiondefining an inner channel with an opening at each terminal end ofmovable sleeve 1072S. The inner channel of movable sleeve 1072S mayextend through a longitudinal length of movable sleeve 1072S. Movablesleeve 1072S may be sized, shaped, and configured to be received throughopening 1073, and the inner channel of movable sleeve 1072S may be sizedto receive stem 1081. Movable sleeve 1072S may be fixed relative tocollar 1072 when in an preassembled configuration and may be movablerelative to collar 1072 upon engagement with plunger rod 1080.

Movable sleeve 1072S may include a plurality of openings that are sizedand shaped to receive protrusion 1085. For example, movable sleeve 1072Smay include a proximal opening 1072U at a proximal end of movable sleeve1072S and a distal opening 1072T at a distal end of movable sleeve1072S. A proximal end of movable sleeve 1072S may further include anangled interface 1071S defining a proximal opening of movable sleeve1072S. Angled interface 1071S may be tapered radially-inward toward theinner channel of movable sleeve 1072S and configured to guide stem 1081and protrusion 1085 into the inner channel of movable sleeve 1072S. Insome embodiments, protrusion 1085 may extend radially outward from stem1081 in opposite directions and may be compressible such that protrusion1085 is configured to compress into and/or toward stem 1081 in responseto a force being applied thereto.

Still referring to FIG. 2D, the proximal end of movable sleeve 1072S maybe positioned adjacent to a proximal end of collar 1072 and a distal endof movable sleeve 1072S may be positioned adjacent to a distal end ofcollar 1072 when in the preassembled position. Plunger rod 1080 may bereceived through the inner channel of movable sleeve 1072S with stem1081 extending through collar 1072. Protrusion 1085 may be receivedwithin distal opening 1072T such that plunger rod 1080 may be fixed tomovable sleeve 1072S. Protrusion 1085 may be configured to exit distalopening 1072T and expand laterally outward in response to plunger rod1080 translating relative to movable sleeve 1072S.

For example, as shown in FIG. 2E, applying a distally-directed forceonto actuation portion 1082 may cause protrusion 1085 to compressradially inward, thereby allowing stem 1081 to translate distallyrelative to movable sleeve 1072S. In this instance, protrusion 1085 mayexit distal opening 1072T and expand upon translating distally from adistal end of movable sleeve 1072S. Device 1050 may transition from apreassembled state to a primed state, in response to stem 1081translating distally relative to collar 1072, until actuation portion1082 abuts against a proximal end of movable sleeve 1072S. In thisinstance, device 1050 may be in a primed state and further translationof stem 1081 relative to collar 1072 may be inhibited by the presence ofmovable sleeve 1072S.

Referring now to FIG. 2F, plunger rod 1080 may couple to movable sleeve1072S in response to proximal translation of stem 1081 relative tocollar 1072 until protrusion 1085 engages proximal opening 1072U. Itshould be understood that protrusion 1085 may be in a compressed statewhen translating through an inner channel of movable sleeve 1072S andmay expand into proximal opening 1072U upon longitudinal alignmenttherewith. With protrusion 1085 engaged to proximal opening 1072U, adistal translation of plunger rod 1080 relative to flange piece 1070 mayprovide a simultaneous movement of movable sleeve 1072S relative tocollar 1072. It should be appreciated that a collective length ofmovable sleeve 1072S and plunger rod 1080 may be greater than alongitudinal length of plunger rod 1080 alone.

As seen in FIG. 2G, plunger rod 1080 may be configured to move movablesleeve 1072S through a channel of flange piece 1070 by a predetermineddistance until actuation portion 1082 encounters a proximal end ofcollar 1072. Plunger rod 1080 may be configured to deliver a dose fromdevice 1050 in response to translating movable sleeve 1072S distallyrelative to collar 1072. It should be appreciated that the dosagedelivered by device 1050 may be controlled based on the predetermineddistance between actuation portion 1082 and collar 1072 when protrusion1085 is received within proximal opening 1072U. In some embodiments,flange piece 1070 may be configured to inhibit proximal movement ofmovable sleeve 1072S relative to collar 1072 when protrusion 1085 isreceived within proximal opening 1072U. Although not shown, flange piece1070 may include one or more blocking components operable to restrictproximal retraction of movable sleeve 1072S from opening 1073.

In other embodiments, as seen in FIGS. 2H-2M, plunger rod 1080 mayinclude at least one protrusion 1085W positioned on actuation portion1082. In the example, protrusion 1085W may be positioned at or adjacenta distal end of actuation portion 1082 such that protrusion 1085W may bereceived within flange piece 1070 in response to translation of plungerrod 1080 into collar 1072.

As seen in FIG. 2K, flange piece 1070 may include one or more channelsformed along an inner surface of collar 1072. In particular, collar 1072may include a first (proximal) helical channel 1071W formed along aninterior of collar 1072 and having a first curvature, and a second(distal) helical channel 1072W formed along the interior of collar 1072and having a different and/or opposite curvature than the first helicalchannel 1071W. For example, when viewed from the proximal end ofactuation portion 1082, first helical channel 1071W may be concave,while second helical channel 1072W may be convex when viewed from thesame vantage point. Or, first helical channel 1071W may be convex whenviewed from the proximal end of actuation portion 1082, while secondhelical channel 1072W is concave from the same vantage point. Further,second helical channel 1072W may be longitudinally spaced apart fromfirst helical channel 1071W. First helical channel 1071W may beconnected with second helical channel 1072W by an intermediate, thirdchannel 1073W extending therebetween.

Third channel 1073W may extend along or substantially parallel to alongitudinal axis of collar 1072. It should be understood that a size,shape, and/or orientations of the one or more channels on collar 1072are merely exemplary such that other suitable configurations may beincluded without departing from a scope of this disclosure. As describedin detail below, the plurality of channels 1072 are configured toreceive protrusion 1085W. In some embodiments, first helical channel1071W and second helical channel 1072W may be threaded and configured tomesh with a corresponding component of plunger rod 1080 (e.g.,protrusion 1085W). Opposite rotational movement may be required forprotrusion 1085W to traverse through first helical channel 1071W andsecond helical channel 1072W. For example, a first rotational movementof actuation portion (e.g., clockwise) may cause protrusion 1085W totraverse first helical channel 1071W, while an opposing rotationalmovement (e.g., counterclockwise) may cause protrusion 1085W to traversethrough second helical channel 1072W.

Referring to FIG. 2H, with plunger rod 1080 in a ready position,protrusion 1085W may be received within collar 1072 in response to adistal translation of actuation portion 1082 toward flange piece 1070.As seen in FIG. 21, protrusion 1085W may be received within firsthelical channel 1071W and moved therethrough in response to a rotationof plunger rod 1080 (e.g., in a first direction) relative to flangepiece 1070. It should be appreciated that plunger rod 1080 may beconfigured to translate axially in a distal direction relative to flangepiece 1070 as plunger rod 1080 rotates within collar 1072, due to thecurvature of first helical channel 1071W. For example, plunger rod 1080may translate a first distance defined by a configuration of firsthelical channel 1071W until reaching a terminal end of first helicalchannel 1071W. The first distance may correspond to a priming step ofdevice 1050 such that device 1050 may be at least partially primed uponprotrusion 1085W moving through first helical channel 1071W.

Referring now to FIG. 2J, protrusion 1085W may be positioned at aterminal end of first helical channel 1071W and a proximal (e.g., top)end of third channel 1073W. In some embodiments, plunger rod 1080 mayexperience a tactile feedback formed by the terminal end of firsthelical channel 1071W. Plunger rod 1080 may be translated distallythrough third channel 1073W to complete a priming step of device 1050,as shown in FIG. 2K. It should be understood that first helical channel1071W and third channel 1073W may collectively define a priming distanceof device 1050 such that plunger rod 1080 is in a primed position whenprotrusion 1085W translates through third channel 1073W.

With protrusion 1085W received within second helical channel 1072W,plunger rod 1080 may be rotated in the second direction (opposite of thefirst direction) to translate plunger rod 1080 distally by a seconddistance that is defined by a configuration of second helical channel1072W. The second distance may be less than, greater than, and/orsubstantially equal to the longitudinal dimension of second helicalchannel 1072W, depending on the particular application and need. Plungerrod 1080 may be rotated in the second direction and translated by thesecond distance until reaching a terminal end of second helical channel1072W to deliver a dose from device 1050. It should be understood thatthe second distance may correspond to a dosage delivery step of device1050 such that device 1050 may deliver the dose upon protrusion 1085Wmoving through second helical channel 1072W and arriving at a dosecompletion position.

In other embodiments, as seen in FIGS. 2L-2O, plunger rod 1080 mayinclude a protrusion, a knob, and/or a thread 1085X positioned onactuation portion 1082. In the example, thread 1085X may be positionedabout a circumference of actuation portion 1082 and along a distal endsuch that thread 1085X may be received within flange piece 1070 inresponse to translation of plunger rod 1080 into collar 1072.

Flange piece 1070 may further include a threaded portion 1072X disposedwithin opening 1073 and forming a helical path that is configured toreceive thread 1085X. In the example, threaded portion 1072X may bepositioned along a proximal portion of opening 1073 such that a distalportion of opening 1073 may include a non-threaded portion 1071X. Asdescribed in further detail herein, threaded portion 1072X may define alongitudinal distance corresponding to a priming step of device 1050 andnon-threaded portion 1071X may define a distance corresponding to adosage delivery step of device 1050.

For example, as seen in FIG. 2L, actuation portion 1082 may betranslated distally toward flange piece 1070 until thread 1085Xencounters a distal end of collar 1072. Rotation of plunger rod 1080 ina first direction (e.g., clockwise or counter clockwise) may causethread 1085X to engage threaded portion 1072X. As shown in FIG. 2M,rotation of plunger rod 1080 may provide axial/longitudinal translationof actuation portion 1082 into collar 1072 as thread 1085X moves throughthe helical path of threaded portion 1072X. It should be appreciatedthat rotation and translation of thread 1085X through threaded portion1072X may transition device 1050 from a ready position (FIG. 2L) to aprimed position (FIG. 2N). With thread 1085X disengaged from threadedportion 1072X and positioned along non-threaded portion 1071X, device1050 may be in the primed position. In some instances, a feedback (e.g.,tactile, auditory, etc.) may be generated in response to thread 1085Wexiting threaded portion 1072X and/or entering non-threaded portion1071X.

In this instance, as shown in FIG. 2O, actuation portion 1082 may betranslated distally relative to flange piece 1070 to deliver a dose fromdevice 1050 by application of a distally-directed force againstactuation portion 1082. Thread 1085X may move through the distal portionof opening 1073 when thread 1085X is positioned within non-threadedportion 1071X. A longitudinal length of non-threaded portion 1071Xdefined between a distal end of thread portion 1072X and a distal end ofopening 1073 may control a dosage delivery of device 1050. Device 1050may complete delivery of a dose when actuation portion 1082 engages aproximally-facing and distal surface of collar 1072 and plunger rod 1080arrives at the dose completion position.

FIGS. 2P-2T illustrate further embodiments of a flange piece that may beconfigured and operable similar to flange piece 1070 shown and describedabove except for the differences explicitly noted herein. It should beunderstood that like reference numerals are used to identify likecomponents and the flange pieces described below may be readilyincorporated with one or more components of device 1050 shown anddescribed above.

For example, referring initially to FIG. 2P, a flange piece 1070A mayinclude one or more flanges 1076A that may be sized and configured toaid a user in holding device 1050 and/or expelling a formulated drugsubstance from device 1050. Flanges 1076A may be further sized and/orshaped to allow a user to hold device 1050 with a plurality of hand/grippositions, arrangements, and/or orientations. By way of illustrativeexample, flanges 1076A may be sized and/or shaped such that flange piece1070A may be held similar to a writing instrument (e.g., pencil, pen,etc.) without requiring use of flanges 1076A, or sized in accordancewith the example shown in FIG. 24A such that flanges 1076A may abutagainst one or more fingers of a user. Flange piece 1070A may include apair of flanges 1076A extending radially outwardly from collar 1072 inopposite radial directions relative to one another. Flanges 1076A mayextend transversely from collar 1072 (e.g., flanges 1076A may include anangled surface that is sloped radially-inward in a distal direction) andconfigured to inhibit a user's fingers from slipping off of flange piece1070A during use of device 1050.

Flanges 1076A may be coupled to one another to form a semi-circularprofile with a minimal radius relative to collar 1072. Accordingly,flanges 1076A may form a slim profile to facilitate visualization of atarget treatment site at a distal end of device 1050 (not shown) whenusing device 1050 from a perspective proximal of finger flange 1070A. Itshould be understood that flange piece 1070A may include various otherquantities and/or arrangements of flanges 1070A than those shown anddescribed herein without departing from a scope of this disclosure. Inother embodiments, flanges 1076 may include various other suitable sizesand/or shapes.

Flange piece 1070A may further include a distal collar 1075A extendingdistally from collar 1072 and configured to engage body 1060 to holdflange piece 1070A in a fixed position relative to body 1060. Distalcollar 1075A may be adhered to, molded, or otherwise affixed to body1060, or may engage body 1060 via a friction fit. In the example, distalcollar 1075A includes a longitudinal length that is generally less thana longitudinal length of collar 1072. In some embodiments, distal collar1075A may be sized sufficiently small enough to facilitate adequateexposure of body 1060 for user grasp and/or manipulation during use ofdevice 1050. Additionally, distal collar 1075A may include a materialcomposition that is similar to and/or different from collar 1072. Forexample, distal collar 1075A may be formed of a flexible material suchthat distal collar 1075A may be configured to flex radially-outward whenreceiving body 1060 into flange piece 1070A and flex radially-inwardonce body 1060 is fully received to facilitate a snap-fit connection(without breaking distal collar 1075A). It should be appreciated that,in other embodiments, flange piece 1070A may omit distal collar 1075Aentirely.

In other embodiments, as seen in FIG. 2Q, a flange piece 1070B mayinclude a distal collar 10756 that is substantially longer than distalcollars 1075, 1075A shown and described above. For example, distalcollar 1075B may be enlarged with a longitudinal length that is greaterthan a longitudinal length of collar 1072. In the example, distal collar1075A may be sized sufficiently large enough to encompass a substantiallength of body 1060. In this instance, an exterior surface of distalcollar 10756 may provide an interface for a user to grasp and/ormanipulate during use of device 1050. Additionally, distal collar 1075Bmay include an expanded diameter that exceeds a diameter of body 1060 toprovide an enhanced surface area for grasping flange piece 10706. Stateddifferently, distal collar 10756 may have a widened size and/or shape tofacilitate ease in gripping and/or manipulating device 1050. In thepresent example, distal collar 1075B may have a barrel-shape with aconvex outer surface when viewed from an exterior of device flange piece10706.

Alternatively, as seen in FIG. 2R, a flange piece 1070C may include adistal collar 1075C that is substantially similar to distal collar 1075Band includes a longitudinal length that is greater than a longitudinallength of collar 1072. In the example, an exterior surface of distalcollar 1075C may be configured to provide an interface for a user tograsp and/or manipulate during use of device 1050. Distal collar 1075Cmay include a slim profile with a diameter that is greater than adiameter of body 1060 such that distal collar 1075C does notsubstantially increase a profile of body 1060. Stated differently,distal collar 1075C may have a narrowed size relative to distal collar1075B. In some embodiments, distal collar 1075C may include a terminallip 1077C that extends radially outward at a distal end. Terminal lip1077C may be sized, shaped, and configured to enhance gripping and/ormanipulation of distal collar 1075C. In the present example, distalcollar 1075C may have a flared-shape with a concave outer surface whenviewed from an exterior of device flange piece 1070C.

In other embodiments shown in FIGS. 2S-2T, a flange piece 1070D mayinclude a collar 1072D having a proximal lip 1074D. Proximal lip 1074Dmay define an irregular surface configured to interface with plunger rod1080 when actuation portion 1082 is received by collar 1072D. Forexample, proximal lip 1074D may include a pair of recessed surfaces1075D positioned along opposing sides from one another along proximallip 1074D. In other words, recessed surfaces 1075D may be separated fromone another by surfaces and/or portions of proximal lip 1074D that arenot recessed. In the example, recessed surfaces 1075D may be positionedadjacent to slots 1074 and may define a pathway for moving plunger rod1080 relative to collar 1072D for priming and delivering a dose fromdevice 1050. In some embodiments, recessed surfaces 1075D may include aspiral configuration (e.g., have a distally-directed slope) such thatrecessed surfaces 1075D may be tapered in a distal direction between afirst ledge 1073D and a second ledge 1076D.

In some embodiments, flange piece 1070D may include visualizationmechanisms, such as, for example, one or more labels or markingsdisposed on collar 1072D to provide instructions to a user of device1050. For example, the one or more labels (e.g., numbering) may indicatedirections in which to rotate or otherwise move plunger rod 1080relative to flange piece 1070D to prime and deliver a dosage from device1050. By way of example, the one or more labels may include markingsthat indicate a start position (e.g., “1”), a priming position (e.g.,“2”), and a dosage delivery position (e.g., “3”) of protrusions 1086relative to proximal lip 1074D. The one or more labels may be adhered,printed, embossed, and/or molded onto collar 1072D.

As described in greater detail herein, flange piece 1070D may beconfigured to allow movement of plunger rod 1080 in a single directionwhen priming and delivering a dosage from device 1050. In exemplary use,plunger rod 1080 (not shown) may initially be received through flangepiece 1070D and actuation portion 1082 may be positioned against collar1072D with protrusions 1086 positioned along a first end of recessedsurfaces 1075D at marking “1” and opposite of slot 1074. Protrusions1086 may only be rotated in a single direction along recessed surface1075D, toward marking “2,” due to first ledge 1073D inhibitingprotrusions 1086 from moving in an opposite direction away from marking“2”.

When protrusions 1086 are received along recessed surfaces 1075D atmarking “2,” second ledge 1076D may further prevent protrusions 1086from moving past slots 1074 and passing by marking “3”. It should beappreciated that a configuration of proximal lip 1074D is exemplary suchthat flange piece 1070D may include various other sizes, shapes, and/orconfigurations of proximal lip 1074D and/or recessed surfaces 1075D thanthose shown and described herein to facilitate movement of plunger rod1080 during use of device 1050.

In other embodiments, the components of device 1050 may include one ormore color indicators in lieu of and/or in addition to the markingsdescribed above to provide instructions to a user of device 1050. Forexample, device 1050 may include colors, symbols (e.g., arrows), and thelike indicating a direction in which to rotate or otherwise move plungerrod 1080 relative to flange piece 1070D to prime and deliver a dosage.In one embodiment, an exterior surface of plunger rod 1080 may beprovided with different colors along various portions of actuationportion 1082 to indicate a respective start position (e.g., green),priming position (e.g., yellow), and dosage delivery position (e.g.,red) of plunger rod 1080 relative to collar 1072D. The one or more colorindicators may be printed or molded onto plunger rod 1080. In otherembodiments, the various portions of plunger rod 1080 may includedifferent textures in lieu of and/or in addition to the color indicatorsdescribed above to provide instructions to a user of device 1050.

Components of device 1050 may be made of any suitable material, and eachcomponent may be made from the same or different materials as othercomponents. It should be appreciated that, in some embodiments, one ormore components of device 1050 (e.g., flange piece 1070, proximal collar1072, plunger rod 1080, actuation portion 1082, and more) may be formedof a flexible material having sufficient flexibility to prevent breakageduring flexing. In some embodiments, the one or more components ofdevice 1050 may be rigid and have enough strength to maintain shape andprovide support. In other embodiments, one or more components of device1050 (or at least a portion of a component) may having a varyingrigidity along a longitudinal length or lateral width such that thecomponent may have a variable flexibility. In still further embodiments,the one or more components of device 1050 may have sufficientflexibility to prevent breakage during flexing while also havingsufficient rigidity and strength to maintain shape and provide support.In some embodiments, such features may further provide a user feedback(e.g., tactile, audible, visual, etc.) when flexing and/or interactingwith other components of device 1050. For example, each of body 1060,flange piece 1070, and plunger rod 1080 may be made of a materialincluding a polymer, such as a plastic. In some embodiments, one or moreof body 1060, flange piece 1070, and plunger rod 1080 may includemultiple different materials (e.g., glass, rubber, and/or plastic). Insome embodiments, for example, the cylindrical portion of body 1060 maybe made of glass, Plexiglas, or any other suitable polymer (e.g., cyclicolefin polymer or cyclic olefin copolymer) or other material, andstopper 1062 may be made of, e.g., plastic, rubber, or other polymer orcopolymer. By way of further example, flange piece 1070 may include apolypropylene homopolymer, an ABS (Acrylonitrile, Butadiene, andStyrene) polymer, ABS polycarbonate blend, and other suitable materials.In some embodiments, plunger rod 1080 may include an ABS polycarbonateblend. Such materials may provide greater tolerances for manufacturing(e.g., injection molding) flange piece 1070 and/or plunger rod 1080, orfacilitate an increased reproducibility of said components of device1050. As described in greater detail above, in some embodiments, one ormore components of device 1050 may be formed of a flexible and/ordeformable material composition providing greater tolerances for flexingor deforming said components (e.g., without breaking) when priming ordelivering a dose from device 1050.

In some embodiments, a portion of body 1060 configured to contain aformulated drug substance may be made of a transparent or translucentmaterial. In some embodiments, flange piece 1070 and plunger rod 1080may be made of the same, similar, or different materials, such assimilar or different plastics (e.g., each having a similar or differenthardness). In some embodiments, parts of device 1050 may include elasticmaterials. For example, parts of device 1050 may include rubber orplastic configured to allow a user to better grip device 1050, or tocreate an airtight or otherwise sealing fit between two components ofdevice 1050 (e.g., between body 1060 and stopper 1062). In someembodiments, some or all of plunger rod 1080 (e.g., actuation portion1082 and/or extensions 1087, or alternately the entirety of plunger rod1080) may be made of a material having some flexibility, e.g., to allowfor bending of extensions 1087. One or more of the materials listedabove (e.g., plastic, rubber, polymers, or copolymers) may have suchcharacteristics. In some embodiments, some or all of device 1050 may besuitable for sterilization, e.g., heat or chemical sterilization.

FIGS. 3A and 3B depict an exemplary method of assembling the deliverydevice depicted in FIGS. 1A-1E. Flange piece 1070 may be assembled tobody 1060, as shown in FIG. 3A. The assembly of flange piece 1070 tobody 1080 may include sliding, snapping, adhering, or otherwise affixingthe two components together. As depicted in FIG. 3A, flange piece 1070may be slid onto body 1060, e.g., such that lip 1071 of flange piece1070 engages with body flange 1061. Plunger rod 1080 may be insertedthrough the assembled flange piece 1070 and body 1060, such that adistal end of plunger rod 1080 contacts stopper 1062. The assembleddevice 1050 may then be in a configuration suitable for packaging,sterilization, and/or use.

FIGS. 3C-3F depict an exemplary method of assembling device 1050 inwhich actuation portion 1082 includes extensions 1087 and collar 1072includes side openings 1094. In such an embodiment, plunger rod 1080 maybe inserted through flange piece 1070 until the hook or clip portions ofextensions 1087 are received within side openings 1094, at which pointthe assembled device 1050 may be in a configuration suitable forpackaging, sterilization, and/or use. It should be appreciated that sideopenings 1094 may be configured to inhibit a proximal retraction ofplunger rod 1080 relative to flange piece 1070 once the hook or clipportions of extensions 1087 are received therein. Side openings 1094 mayfunction as a first lock when device 1050 is placed into an initialassembly state to prevent disassembly of device 1050.

As described in further detail herein (see FIGS. 4G-4J), side openings1095 may be configured to inhibit a proximal retraction of plunger rod1080 once the hook or clip portions of extensions 1087 are receivedtherein. Side openings 1095 may function as a second lock when device1050 is placed in a dosage delivery state to prevent extracting patientfluid after completion of drug/medicament delivery. It should beappreciated that side openings 1094, 1095 may generate a feedbackindicating a relative position of plunger rod 1080 to flange piece 1070,such as, for example, an audible feedback, a tactile feedback, and thelike. In some embodiments, device 1050 may include additional and/orfewer side openings 1094, 1095 than those shown and described herein toincrease and/or decrease a quantity of locks on device 1050.

In some embodiments, assembling device 1050 may include pre-filling body1060 before combining it with flange piece 1070 and stopper 1080; forexample, a predetermined amount of drug substance may be disposed inbody 1060 between stopper 1062 and needle end 1064. In some embodiments,an alternate order of assembly of the components of device 1050 may beemployed, depending on contemplated variations in the structures ofcomponents of device 1050. For example, in an embodiment (not shown) inwhich flange piece 1070 is configured to be assembled to body 1060 usinga snap-fit interface, plunger rod 1080 may be first inserted throughflange piece 1070, and the combined flange piece 1070 and plunger rod1080 may be assembled to body 1060, e.g., such that flange piece 1070snaps over a proximal body flange 1061 of body 1060 and plunger rod 1080is inserted into body 1060.

FIGS. 4A-4F depict an exemplary method of using device 1050, accordingto aspects of the present disclosure. In a pre-use configurationdepicted in FIG. 4A, device 1050 may hold a volume of a drug substancein between stopper 1062 and expulsion end 1064. A priming distance p mayexist between protrusions 1086 and a proximal end of proximal collar1072, and protrusions 1086 may be non-aligned with slots 1074. In apriming step depicted in FIG. 4B, plunger rod 1080 may be movedlongitudinally further into body 1060. For example, a user may pressactuation portion 1082 partially into proximal collar 1072 of flangepiece 1070. In some embodiments, device 1050 may be held in an invertedposition during this step, to ensure that air trapped in body 1060 maybe expelled via expulsion end 1064, as stopper 1062 is pushed distallyby plunger rod 1080. In the pre-use configuration of FIG. 4A and duringthe priming step shown in FIG. 4B, plunger rod 1080 may be preventedfrom rotating about the longitudinal axis of the syringe, due to thegeometries of opening 1073 in flange piece 1070, and neck 1084 ofplunger rod 1080 (as shown in the top cross-sectional view in FIG. 4B).As shown in FIG. 4C, the priming step may be stopped when protrusions1086 of plunger rod 1080 abut a proximal end of proximal collar 1072.When the priming step is completed, neck 1084 of plunger rod 1080 may bepositioned longitudinally with respect to opening 1073 of flange piece1070, such that it may now be rotatable with respect to flange piece1070. For example, when the priming step is completed, a narrowerportion of neck 1084 may be disposed inside opening 1073 than whendevice was in a pre-use configuration.

As depicted in FIG. 4D, device 1050 may be in a primed configuration. Ina dispensing preparation step depicted in FIG. 4E, plunger rod 1080 maybe rotated about a longitudinal axis to align protrusions 1086 withslots 1074. To do so, a user may grasp and twist actuation portion 1082.In some embodiments, as has been described elsewhere, it may be possibleto twist actuation portion 1082 in either direction to align protrusions1086 and slots 1074. In other embodiments, actuation portion 1082 may berotatable only in one direction. In some embodiments, once protrusions1086 are aligned with slots 1074, further rotation of plunger rod 1080relative to flange piece 1070 may be stopped by, e.g., contact betweenthe geometries of neck 1084 and opening 1073. Thus, aligning protrusions1086 and slots 1075 may lock device 1050 in a ready-to-dispenseconfiguration. In some embodiments, rotation of actuation portion 1082may align protrusions 1086 with slots 1074, and may allow plunger rod1080 to remain longitudinally stationary relative to flange piece 1070(e.g., no proximal or distal movement of plunger rod 1080 is caused byrotation of actuation portion 1082). As depicted in FIG. 4F, in adispensing step, plunger rod 1080 may be moved longitudinally furtherinto body 1060. For example, a user may press actuation portion 1082distally into proximal collar 1072 of flange piece 1070, such thatprotrusions 1086 slide into slots 1074. Once protrusion 1086 abut distalends of slots 1074, further distal movement of plunger rod 1080 isstopped. The dispensing step may ensure that a predetermined volume of adrug substance inside body 1060 is dispensed from device 1050. In someembodiments, when protrusions 1086 abut distal ends of slots 1074,stopper 1062 does not “bottom out” or abut an interior of expulsion end1064 in body 1060. Advantageously, by ensuring that a predeterminedvolume of a drug substance inside body 1060 is dispensed from device1050 before stopper 1062 can bottom out, any variations in themanufacture of expulsion end 1064 (e.g., altering the exact size orshape of expulsion end 1064) are less likely to affect the predeterminedvolume of drug substance that is delivered from device 1050. Indeed, insome embodiments, the predetermined volume of drug substance that isdelivered from device 1050 may not be affected by typical variations inmanufacturing of any component of device 1050, particularly in anycomponent except for flange piece 1070. Advantageously, this may allowfor the existence of different or larger tolerances in manufacturingvariation in several components of device 1050 (e.g., variations information of a glass body 1060 or other glass components), withoutaffecting the predetermined volume of drug substance to be deliveredfrom device 1050.

In some embodiments, after one or more steps in the use of device 1050,a user may be prevented from re-doing a step, and/or from reversing oneor more steps. For example, geometries of, e.g., plunger rod neck 1084and opening 1073 may prevent a user from pulling plunger rod 1080proximally (e.g., out of) body 1060, from rotating plunger rod 1080preemptively (e.g., before the priming step shown in FIG. 4C), and/orfrom over-rotating plunger rod 1080 during a dispensing preparation step(e.g., shown in FIG. 4E). In particular, FIGS. 4G-4J depict steps in theuse of an embodiment of device 1050 having extensions 1087 on actuationportion 1082 and corresponding side openings 1094, 1095 in collar 1072of flange piece 1070. FIGS. 4G and 4H depicts device 1050 as actuationportion 1082 is being pushed distally into collar 1072. Due to theirangled distal portions, extensions 1087 are pushed inward into collar1072. Once plunger rod 1080 has been rotated to a “delivery” positionand actuation portion 1082 is further pushed distally into collar 1072to deliver a predetermined volume of drug substance from device 1050,extensions 1087 may be received into side openings 1095 (shown in FIGS.4I and 4J), thereafter restricting proximal movement of plunger rod1080. Advantageously, restricting proximal movement of plunger rod 1080may prevent inadvertent withdrawal of material into device 1050 from,e.g., a site into which a drug substance is delivered. In someembodiments, device 1050 may include either side openings 1094, or sideopenings 1095. In other embodiments, as shown in FIGS. 4G-4J, device1050 may include both side openings 1094 and side openings 1095.

FIGS. 4K and 4O depicts in further detail exemplary aspects of ageometry of neck 1084, which may help to control movement of plunger rod1080. For example, a proximal-most portion a of neck 1084 and stem 1081(indicated by section d in FIG. 4K) may both have a firstcross-sectional shape, as shown in FIG. 4L. This shape may allow forcorresponding portions of plunger rod 1080 to move proximally/distallythrough an opening (e.g., opening 1073) of a blocking component (e.g.,flange piece 1070), but may prevent rotation of plunger rod 1080 about alongitudinal axis. A narrow portion b of neck 1084 may have a smallercross-sectional shape, as shown in FIG. 4M. This shape, when disposed inan opening (e.g., opening 1073) of a blocking component (e.g., flangepiece 1070) may allow for unidirectional or bidirectional rotation ofplunger rod 1080 about a longitudinal axis. It should be appreciatedthat the respective portion of neck 1084 allowing for transitionalrotation of plunger rod 1080 (e.g., at narrow portion b) may have ageometry with the smallest cross-sectional shape to allow greater spacefor such movement, relative to the cross-sectional shapes of otherportions of plunger rod 1080. A third portion c of neck 1084 may have alarger cross-sectional shape, as shown in FIG. 4N, which may corresponddirectly with the size and shape of an opening (e.g., opening 1073) of ablocking component (e.g., flange piece 1070). As such, proximal ordistal movement of this portion of neck 1084 through opening 1073 mayonly be possible when plunger rod 1080 is in a specific rotationalorientation relative to flange piece 1070. Moreover, plunger rod 1080will not be rotatable while portion c of neck 1084 is disposed withinopening 1073. This may ensure that, e.g., plunger rod 1080 is in adesirable position relative to flange piece 1070 (e.g., priming iscomplete and portion c is no longer disposed within opening 1073) beforeplunger rod 1080 may be rotated. Together, the various cross-sectionalshapes of neck 1084 and the size and shape of opening 1073 may combineto create a specific sequence of movements of plunger rod 1080 needed toprime and deliver a drug substance from device 1050. In the example, adistal portion of opening 1073 may have the greatest cross-sectionalprofile relative to an intermediate and/or proximal portion of opening1073 to accommodate the varying geometries of plunger rod 1080therethrough (e.g., neck 1084, stem 1081, etc.).

In a further embodiment depicted in FIG. 4O, a proximal-most portion eof neck 1084 and a majority portion h of stem 1081 may both have a firstcross-sectional shape, as shown in FIG. 4P. This shape may allow forcorresponding portions of plunger rod 1080 to move proximally/distallythrough an opening (e.g., opening 1073) of a blocking component (e.g.,flange piece 1070), but may prevent rotation of plunger rod 1080 about alongitudinal axis. A narrow portion f of neck 1084 may have a smallerwinged (or arrow-shaped) cross-sectional shape, as shown in FIG. 4Q (ina pre-rotation configuration relative to flange piece 1070) and FIG. 4R(in a post-rotation configuration relative to flange piece 1070). This“winged” shape, when disposed in an opening (e.g., opening 1073) of ablocking component (e.g., flange piece 1070) may allow forunidirectional or bidirectional rotation of plunger rod 1080 about alongitudinal axis, and may restrict or resist “backwards” rotation ofplunger rod 1080 in the opposite direction after rotation has beencompleted (as described further with respect to FIGS. 4T-4X). Portions gand l of plunger rod 1080 may have a larger cross-sectional shape, asshown in FIG. 4S, which may correspond directly with the size and shapeof an opening (e.g., opening 1073) of a blocking component (e.g., flangepiece 1070). As such, proximal or distal movement of these portions ofplunger rod 1080 through opening 1073 may only be possible when plungerrod 1080 is in a specific rotational orientation relative to flangepiece 1070. Moreover, plunger rod 1080 will not be rotatable whileportions g or l of plunger rod 1080 are disposed within opening 1073.This may ensure that, e.g., plunger rod 1080 is in a desirable positionrelative to flange piece 1070 at certain steps during assembly and useof device 1050, allowing for precise assembly and use of device 1050.Additionally, the “larger” cross sectional area of portions g and l mayassist in preventing plunger rod “back-out”, as they will not be able tomove proximally through opening 1073 unless in a particular rotationalposition relative to flange piece 1070. For example, after rotation ofplunger rod 1080 from a “primed” position to a “delivery” position,portion g of plunger rod 1080 may not be able to move through opening1073, thus preventing plunger rod “back-out” at that stage of use ofdevice 1050. Together, the various cross-sectional shapes of plunger rod1080 and the size and shape of opening 1073 may combine to create aspecific sequence of movements of plunger rod 1080 needed to assemble,prime, and deliver a drug substance from device 1050.

FIGS. 4T-4X depict in further detail specific interactions between awing-shaped part of neck 1084 and opening 1073 in flange piece 1070.Flange piece 1070 may include detents 1078 either adjacent to or withinopening 1073, which may interface with wings 1089 on neck 1084. FIG. 4Tdepicts a cross-sectional view of neck 1084 inside opening 1073 in apre-rotation configuration (e.g., after device 1050 has been primed butbefore plunger rod 1080 has been rotated to a “delivery” configurationrelative to flange piece 1070). FIG. 4U depicts that, as plunger rod1080 is rotated about a longitudinal axis, one of wings 1089 may contactone of detents 1078 (depending on the direction of rotation). Asrotation continues, one of detents 1078 may cause one of wings 1089 tobe compressed towards the remainder of neck 1084. When rotation iscomplete, the one of wings 1089 has passed the one of detents 1078 andhas expanded. This expansion of a wing 1089 past detent 1078 may causean auditory “click” feedback and/or a tactile feedback to indicate thatrotation is complete, and may thereafter prevent “backwards” rotation ofplunger rod 1080 relative to flange piece 1070. Wings 1089 and detents1078 may be configured to interact in a similar fashion regardless ofwhether plunger rod 1080 is rotated in a clockwise or counterclockwisedirection, thereby allowing for bidirectional rotation of plunger rod1080 to move plunger rod 1080 from a “primed” position to a “delivery”position. As shown in further detail in FIG. 4X, each wing 1089 may havea rounded shape to allow for ease of rotation in one direction, and theexpansion of a wing 1089 past a detent 1078 may place the wing 1089 in aposition relative to detent 1078 that greatly resists or otherwiseprohibits rotation in the opposite direction. Detent 1078 may have anysuitable contour configured to assist unidirectional movement of a wing1089 past detent 1078.

Advantageously, the various configurations of plunger rod 1080 describedherein may allow for modeling, molding, and/or manufacturing one piece(e.g., plunger rod 1080) or two pieces (e.g., plunger rod 1080 andflange piece 1070) in order to achieve several goals—e.g., controldesired plunger rod movement and assembly, reduce user error, preventplunger rod back-out, and minimize a number of disparate parts needingto be manufactured and handled in order to assemble device 1050.

In some embodiments, as seen in FIGS. 4Y-4Z, device 1050 may include apair of plunger rods in one kit, interchangeable with a single actuationportion 1082, or coupled to separate actuation portions 1082. Forexample, referring initially to FIG. 4Y, device 1050 may include a firstplunger rod 1080A that is substantially similar to plunger rod 1080shown and described above except for the differences explicitly notedherein. First plunger rod 1080A may include a stem 1081A having alongitudinal length A defined between a distal end of actuation portion1082 and a tip 1083A. As described in detail below, longitudinal lengthA may define a priming distance for moving plunger rod 1080A relative toflange piece 1070 for priming device 1050. Tip 1083A may have a flatand/or planar interface that may be configured to inhibit engagement ofstopper 1062 when first plunger rod 1080A is received within body 1060.

Referring now to FIG. 4Z, device 1050 may further include a secondplunger rod 1080B that is substantially similar to plunger rod 1080.Second plunger rod 1080B may include a stem 1081B extending distallyfrom actuation portion 1082 and having a longitudinal length B definedbetween a distal end of actuation portion 1082 and a tip 1083B. Tip1083B is substantially similar to tip 1083A described above.Longitudinal length B of stem 1083B is relatively greater thanlongitudinal length A of stem 1081A and may define a dosage deliverydistance for moving plunger rod 1080A relative to flange piece 1070 todeliver a dose from device 1050.

First plunger rod 1080A may be configured to prime device 1050 inresponse to translating stem 1081A through collar 1072 and into body1060 (see FIGS. 1A-1B). In this instance, tip 1083A may contact and pushstopper 1062 distally by the priming distance. It should be understoodthat the priming distance of device 1050 may be controlled based on asize of longitudinal length A of first plunger rod 1080A. Upon primingdevice 1050, first plunger rod 1080A may be removed from body 1060 andflange piece 1070 without retracting stopper 1062 due to aflattened-interface of tip 1083A. Accordingly, stopper 1062 may remainat a fixed position relative to body 1060 upon retraction of firstplunger rod 1080A.

Second plunger rod 1080B may be configured to deliver a dose from device1050 in response to translating stem 1081B through collar 1072 and intobody 1060 (see FIGS. 1A-1B), after the priming step described aboveusing stem 1081A. In this instance, tip 1083B may contact and pushstopper 1062 distally by the dosage delivery distance. It should beunderstood that the dosage delivery distance of device 1050 may becontrolled based on a size of longitudinal length B of second plungerrod 1080B. The dosage delivery distance may be substantially equal tothe difference in length between stem 1081B and stem 1081A.

FIGS. 5A-5C depict another exemplary delivery device 1200 according toadditional embodiments of the present disclosure. Device 1200 includes abody 1220, and a flange piece 1240 with a proximal collar 1242, in whichan inner collar 1260 may be disposed. Together, proximal collar 1242 andinner collar 1260 may form a blocking component for device 1200. Aplunger rod 1280 may pass through inner collar 1260 and flange piece1240, into body 1060. Plunger rod 1280 may share a longitudinal axiswith a central axis of proximal collar 1242 and inner collar 1260, andmay have an actuation portion 1282 sized and configured to fit (e.g.,nest or otherwise fit) inside inner collar 1260.

Device 1200 may be, for example, an injection device, such as a syringe,for dispensing a predetermined volume of a formulated drug substance.Generally, device 1200 may share size, capacity, material, preparation,assembly, manufacturing, operation, or use characteristics with device1050, or with other delivery devices disclosed herein. As with device1050, device 1200 may be configured for ease of use and may include oneor more features that aid a user by providing tactile, auditory, orvisual feedback (e.g., using any of the features described elsewhereherein).

Body 1220 may have any or all of the same characteristics as, e.g., body1060 of device 1050, or as any syringe body known in the art. Forexample, in some embodiments, body 1220 may be pre-fillable orpre-filled (e.g., fillable or filled with a drug substance prior tocompleted assembly, packaging, sterilization and/or shipment of device1200 to users). In some embodiments, a stopper 1222 may be configured tobe inserted into body 1220 and may be configured to hold a predeterminedvolume of a formulated drug substance inside body 1200, between stopper1222 and an expulsion end 1224.

Flange piece 1240 may be of any suitable size and/or shape to close,partially close, cover, or partially cover an end of body 1220 oppositeexpulsion end 1224, and/or to support and hold plunger rod 1280 in placeinside body 1220. In some embodiments, flange piece 1240 may share somecharacteristics with flange piece 1070 of device 1050. For example,flange piece 1240 may include a distal collar 1244 configured to engagewith body 1220 and hold flange piece 1240 in place in relation to body1220. For example, distal collar 1244 may include a lip 1245 that mayslide over a body flange 1226, to hold flange piece 1240 in place. Inalternative embodiments, lip 1245 of distal collar 1244 may be made of aflexible or semi-flexible material, so that it may snap in place overbody flange 1226. In further embodiments, distal collar 1244 or anotherportion of flange piece 1240 may be adhered to, molded to, or otherwiseaffixed to, body 1220, or may engage with body 1220 via a friction fit.

In some embodiments, flange piece 1240 may include one or more flanges1246, which may be sized and configured to aid a user in holding device1200 and/or expelling a formulated drug substance from device 1200. Insome embodiments, as depicted in FIGS. 1A-1E, flange piece 1240 mayinclude two flanges 1246 opposite to one another and extendingperpendicularly from a longitudinal dimension of device 1200. In someembodiments, flange piece 1240 may include other arrangements of aflange or flanges, such as four flanges, or one circumferential flangeextending radially outward from a central longitudinal axis of device1200. In some embodiments, flange piece 1240 may extend radially outwardfrom a central longitudinal axis of device 1200 farther than acircumference of body 1220. In such embodiments, flange piece 1240 maysupport device 1200 if device 1200 is placed on a surface, may preventdevice 1200 from rolling on a flat surface, and/or may allow device 1200to be picked up more easily.

In some embodiments, flange piece 1240 and inner collar 1260 may besized and configured to serve as a blocking component in device 1200,e.g., by limiting and/or directing rotational and longitudinal movementof plunger rod 1280. Proximal collar 1242 of flange piece 1240 may besized and configured to accept part of inner collar 1260, while blockingprotrusions 1262 from moving distally until inner collar 1260 is rotatedto a particular position. In turn, inner collar 1260 may be sized andconfigured to receive part or all of an actuation portion 1282 ofplunger rod 1280. As shown in FIGS. 5A-5C, proximal collar 1242, innercollar 1260, and actuation portion 1282 may all have generallycylindrical shapes; in alternate embodiments, each of proximal collar1242, inner collar 1260, and actuation portion 1282 may have anysuitable size or shape that allows for actuation portion 1282 to fit(e.g., nest) within inner collar 1260, and inner collar 1260 to fitwithin proximal collar 1242.

Plunger rod 1280 and inner collar 1260 may be in general rotatable abouta shared central longitudinal axis (e.g., in one direction or in bothdirections). Moreover, both plunger rod 1280 and inner collar 1260 maybe movable along the central longitudinal axis, e.g., in a distaldirection to prime device 1200 and/or deliver a volume of drug substancefrom distal end 1224 of body 1220. Actuation portion 1282 of plunger rod1280 may include a distal geometry which, when actuation portion 1282 ismoved distally into inner collar 1260, interfaces with inner collar 1260to prevent proximal movement (e.g., back-out) of plunger rod 1280 frominner collar 1260. For example, actuation portion 1282 may include awedge-shaped distal portion that, when it passes a distal portion ofinner collar 1260, expands distally from inner collar 1260 so thatactuation portion 1282 can no longer move freely in relation to innercollar 1260.

Flange piece 1240 may include cavities, such as slots 1248, into whichprotrusions 1262 of inner collar 1260 may slide when inner collar 1260is rotated to a particular position. As with slots 1074 of device 1050,slots 1248 may have a depth dimension parallel to a longitudinal axis ofdevice 1200, and the depth of slots 1248 may correspond to a distanceplunger rod 1280 must move distally in order to push stopper 1222towards expulsion end 1224, and dispense a predetermined volume offormulated drug substance from body 1220 through expulsion end 1224.

In some embodiments, device 1200 may have additional features. Forexample, in some embodiments, a neck of plunger rod 1280 may have ageometry complementary to an opening of flange piece 1240 that restrictsthe extent and direction that plunger rod 1280 may rotate or movelongitudinally, similar to neck 1084 and opening 1073 of device 1050.For example, rotation and/or longitudinal movement of plunger rod 1280may be restricted based on priming, preparing, and/or drug deliverysteps during use of device 1200. As another example, plunger rod 1280may be prevented from being pulled or backed out of body 1220 at anypoint during preparation or use of device 1200.

In a contemplated method of use of device 1200, device 1200 may befilled with a predetermined volume of drug substance. The predeterminedvolume of drug substance may be greater than a volume of drug substancesuitable for delivery to a patient. In some embodiments, device 1200(e.g., body 1220) may contain both a predetermined volume of drugsubstance and an air bubble (not shown) that should be removed prior todelivery of the drug substance to a patient. In some embodiments, device1200 may be a pre-filled syringe. In order to prime device 1200 (e.g.,removing an air bubble if any and ensuring that a suitable volume of thedrug substance will be delivered to a patient), a user may pushactuation portion 1282 of plunger rod 1280 into inner collar 1260. Ageometry of actuation portion 1282 may interact with inner collar 1260(e.g., a distal wedge or clip of actuation portion 1282 may expand on adistal side of inner collar 1260) to secure actuation portion 1282 inand/or to inner collar 1260 and to prevent back-out of plunger rod 1280.At this point, device 1200 may be in a “primed” state. Subsequently,inner collar 1260 may be rotated about a longitudinal axis, untilprotrusions 1262 become longitudinally aligned with slots 1248. At thispoint, device 1200 may be in a “delivery” state. To deliver apredetermined volume of drug substance from device 1200, inner collar1260, together with actuation portion 1282 and plunger rod 1280, maythen be moved distally until protrusions 1262 abut a distal end of slots1248. The distance traveled by plunger rod 1280 in this step may pushstopper 1222 distally by a distance required to dispense thepredetermined volume of drug substance from expulsion end 1224 of device1200.

Referring now to FIGS. 6A-6E, views of a delivery device 1300 andcomponent parts are depicted. Delivery device 1300 includes a blockingcomponent comprising a distal flange piece 1340 and a proximal flangepiece 1360, a plunger rod 1380, and a body 1320. Distal flange piece1340 and proximal flange piece 1360 each include flanges (1346 and 1366,respectively). The flanges 1366 of proximal flange piece 1360 optionallymay include a texture 1365. Distal flange piece 1340 includes a channel1341 which may allow for distal flange piece 1340 and body 1320 to beslidably assembled. Proximal flange piece 1360 includes a clip 1364which may allow for proximal flange piece 1360 and distal flange piece1340 to be movably affixed to one another, such that they may still berotatable relative to one another about a longitudinal axis of deliverydevice 1300 (see, e.g., FIGS. 6D and 6E). Proximal flange piece 1360includes clips 1362 bordering a central opening 1368 through whichplunger rod 1380 may pass. Plunger rod 1380 includes an actuationportion 1382, which optionally may include a texture 1381. Plunger rod1380 further includes a distal neck shape 1384, a proximal neck shape1387, and a proximal stop 1386 having a cavity 1385, all of which areconfigured to interface with distal flange piece 1340 and proximalflange piece 1360 in a plurality of configurations to allow forcontrolled priming and delivery of a predetermined volume of a drugsubstance using delivery device 1300. Plunger rod 1380 further includesa distal tip 1383 at a distal end of a stem 1389, where tip 1383 isconfigured to interface with stopper 1322. Tip 1383 may have anysuitable size, shape, and mode of attaching to, affixing to, or pushingstopper 1322 as has been described with respect to, e.g., tip 1083 ofplunger rod 1080. As with stem 1081, stem 1389 may have any size andconfiguration suitable to fit inside body 1320. In some embodiments,step 1389 may be sized and configured to provide sufficient size (e.g.,thickness), stability and/or rigidity to reduce a likelihood ofundesirable bending, wobbling, or breaking.

Body 1320 (depicted in FIGS. 6D and 6E) may have any or all of the samecharacteristics as, e.g., body 1060 of device 1050, or as any syringebody known in the art. For example, in some embodiments, body 1320 maybe pre-fillable or pre-filled. A stopper 1322 may be configured to beinserted into body 1320 and may be configured to hold a predeterminedvolume of a formulated drug substance inside body 1320, between stopper1322 and an expulsion end 1324.

Delivery device 1300 may be, for example, an injection device, such as asyringe, for dispensing a predetermined volume of a formulated drugsubstance. Generally, delivery device 1300 may share size, capacity,material, preparation, assembly, or manufacturing characteristics withdevice 1050, device 1200, or with other delivery devices disclosedherein. As with devices 1050 and 1200, delivery device 1300 may beconfigured for ease of use and may include one or more features that aida user by providing tactile, auditory, or visual feedback (e.g.,textures 1365, 1381, other textures, labels, colors, or tactile orauditory feedback, or using any of the other features describedelsewhere herein). As with devices 1050 and 1200, such features areoptional, and one or more such features may be combined to improve easeof use.

Proximal flange piece 1360 and distal flange piece 1340 may be of anysuitable size and/or shape to serve as a blocking component in deliverydevice 1300, to close, partially close, cover, or partially cover an endof body 1320 opposite expulsion end 1324, and/or to support and holdplunger rod 1380 in place inside body 1320. In some embodiments,proximal flange piece 1360 and distal flange piece 1340 may each includeone or more flanges, which may be sized and configured to aid a user inholding device 1300 and/or expelling a formulated drug substance fromexpulsion end 1324. In some embodiments, as depicted in FIGS. 6A-6E,flange pieces 1360, 1340 may each include two flanges 1366, 1346respectively, where each pair of flanges is opposite to one another andextending perpendicularly from a longitudinal dimension of device 1300.In general, other arrangements of a flange or flanges, such as oneflange on each of flange pieces 1360, 1340, are possible. Each of flangepieces 1340, 1360 may extend radially outward from a centrallongitudinal axis of device 1300 farther than a circumference of body1320, to, e.g., support device 1300 if device 1300 is placed on asurface, prevent device 1300 from rolling on a flat surface, and/orallow device 1300 to be picked up more easily.

Flange pieces 1360 and 1340 may, in combination, form a central openinghaving a changeable size and/or shape depending on a relative positionof proximal flange piece 1360 and distal flange piece 1340. For example,in the configuration depicted in FIG. 6D, proximal flange piece 1360 anddistal flange piece 1340 may combine to form an opening sized andconfigured to allow for distal passage of distal neck portion 1384 ofplunger rod 1380, but to block passage of proximal neck portion 1387. Inthe second configuration depicted in FIG. 6E (e.g., where flanges 1346and 1366 are in alignment), the central opening formed by flange pieces1360 and 1340 may be sized and configured to allow for distal passage ofproximal neck portion 1387. Proximal stop 1386 may be of a size andshape that is too large to pass through the central opening formed byflange pieces 1360 and 1340 in any combination. In some embodiments,distal flange 1340 may be assembled with body 1320 and plunger rod 1380such that distal flange 1340 is not movable relative to body 1320 andnot rotatable relative to plunger rod 1380. Proximal flange 1360 may, incontrast, be assembled to distal flange 1340 (and body 1320) such thatit is rotatable about a longitudinal axis in relation to distal flange1340, body 1320, and plunger rod 1380, which may pass through centralopening 1368. Specifically, proximal flange 1360 may be rotatablerelative to distal flange 1340 from a first configuration in whichflanges 1346, 1366 are offset from one another (see FIG. 6D), to asecond configuration in which flanges 1346, 1366 overlay one another(see FIG. 6E). One of ordinary skill in the art will understand that inalternate embodiments, distal flange 1340 may be rotatable in relationto other parts of device 1300, while proximal flange 1360 may not berotatable. In yet further embodiments, both proximal flange 1360 anddistal flange 1340 may be assembled with body 1320 and plunger rod 1380such that they are both rotatable relative to other components of device1300.

Clips 1362 of proximal flange piece 1360 may overhang and be biasedtowards opening 1368. In a pre-use configuration (depicted in FIG. 6D),clips 1362 may be compressed by plunger rod 1380. They may be positionedon proximal flange piece 1360 such that, upon distal movement of plungerrod 1380 such that distal neck portion 1384 passes through opening 1368,they expand inward to abut the sides of distal neck portion 1384. Onceclips 1362 expand in this manner, they may block proximal movement ofplunger rod 1380, e.g., to prevent plunger rod back-out (see, e.g., FIG.7C). A cavity 1385 may be positioned on proximal stop 1386 for each clip1362, such that when plunger rod 1380 is moved distally into body 1320to a fullest desired extent, each clip 1362 may fit into a cavity 1385.

FIGS. 7A-7F depict an exemplary method of using device 1300, accordingto aspects of the present disclosure. In a pre-use configurationdepicted in FIG. 7A, device 1300 may hold a volume of a drug substancein between stopper 1322 and expulsion end 1324. Flange pieces 1340 and1360 may be in a pre-use configuration, in which flanges 1346, 1366 areoffset from one another. Plunger rod 1380, which may abut or beassembled to stopper 1322, may be partially inserted into body 1320through flange pieces 1340, 1360. Proximal flange piece 1360 may beprevented from rotating about the longitudinal axis of the syringe, dueto the geometries of plunger rod 1380 and flange piece 1360. In apriming step depicted in FIG. 7B, plunger rod 1380 may be movedlongitudinally further into body 1320, until distal movement is blockedby the abutment of proximal neck portion 1385 against a surface ofproximal flange piece 1360. For example, a user may press actuationportion 1382 towards proximal flange piece 1360. In some embodiments,device 1300 may be held in an inverted position during this step, toensure that air trapped in body 1320 may be expelled via expulsion end1324, as stopper 1322 is pushed distally by plunger rod 1380. In the“primed” configuration, distal neck portion 1384 may be disposed inopening 1368 of proximal flange piece 1360. Moreover, as depicted inFIG. 7C, once the priming step is stopped, clips 1362 may be releasedfrom their compressed configuration such that they may expand inwardsand abut a side of distal neck portion 1384. As distal neck portion 1384may be comparatively narrower than the part of plunger rod 1380previously disposed in opening 1368, the expansion of clips 1362 mayprevent proximal movement (e.g., back-out) of plunger rod 1380.

As depicted in FIG. 7D, device 1300 may be in a primed configuration. Ina dispensing preparation step depicted in FIG. 7E, proximal flange piece1360 may be rotated about a longitudinal axis to align flanges 1366 andflanges 1346, and to change (e.g., enlarge) a shape of the centralopening formed by the combined openings of proximal flange piece 1360and distal flange piece 1340. To do so, a user may grasp and twistproximal flange piece 1360. In some embodiments, it may be possible totwist proximal flange piece in either direction to align flanges 1366and flanges 1346. In other embodiments, proximal flange piece 1360 maybe rotatable only in one direction. In some embodiments, once flanges1366 and flanges 1346 are aligned (as shown in, e.g., FIG. 7E), furtherrotation of plunger rod 1080 relative to flange piece 1070 may bestopped by, e.g., clip 1362 abutting against flange 1346. Thus, device1300 may be locked in a ready-to-dispense configuration. As depicted inFIG. 7F, in a dispensing step, plunger rod 1380 may be movedlongitudinally further into body 1320. For example, a user may pressactuation portion 1382 distally, until each of clips 1362 enter a cavity1385 in a proximal stop 1386, and/or until proximal stop 1386 abuts aproximal surface of proximal flange piece 1360. The dispensing step mayensure that a predetermined volume of a drug substance inside body 1320is dispensed from device 1300.

In some embodiments, after each successive step in the use of device1300, a user may be prevented from re-doing a step, and/or fromreversing one or more steps. For example, geometries of, e.g., plungerrod 1380 and the combined openings of proximal flange piece 1360 anddistal flange piece 1340 may prevent a user from pulling plunger rod1380 proximally (e.g., out of) body 1320, from rotating plunger rod1380, from rotating proximal flange piece 1360 preemptively (e.g.,before completion of the priming step shown in FIGS. 7B and 7C), and/orfrom over-rotating flange piece 1360 during a dispensing preparationstep (e.g., shown in FIG. 7E).

FIGS. 8A-8G depict a further exemplary delivery device 1400 andcomponent parts Delivery device 1400 includes a plunger rod 1480, ablocking component 1460, a flange piece 1440, and a body 1420. Plungerrod 1480 includes an actuation portion 1482 and a protrusion 1484.Blocking component 1460 may be a rotatable alignment component that isconfigured to partially or fully surround plunger rod 1480, and includesthree connected channels 1462, 1464, 1468 sized and configured to allowfor passage of protrusion 1484. Flange piece 1440 includes a proximalcollar 1442 having a channel 1447 into which tabs 1461 of blockingcomponent 1460 may slidably fit, a distal collar 1444 including achannel 1445 into which a flange 1421 of body 1420 may fit (e.g., may beslidably assembled), and flanges 1446.

Body 1420 (depicted in FIGS. 8D and 8E) may have any or all of the samecharacteristics as, e.g., body 1060 of device 1050, or as any syringebody known in the art. For example, in some embodiments, body 1420 maybe pre-fillable or pre-filled. A stopper 1422 may be configured to beinserted into body 1420 and may be configured to hold a predeterminedvolume of a formulated drug substance inside body 1420, between stopper1422 and an expulsion end 1424.

Delivery device 1400 may be, for example, an injection device, such as asyringe, for dispensing a predetermined volume of a formulated drugsubstance. Generally, delivery device 1400 may share size, capacity,material, preparation, assembly, or manufacturing characteristics withdevice 1050, device 1200, device 1300, or with other delivery devicesdisclosed herein. As with other devices disclosed herein, deliverydevice 1400 may be configured for ease of use and may include one ormore features that aid a user by providing tactile, auditory, or visualfeedback, using any of the features described elsewhere herein.

Blocking component 1460 may be of any suitable size and/or shape toassist in controlling proximal and distal movement of plunger 1480 indevice 1400.

Flange piece 1440 may be of any suitable size and shape to close,partially close, cover, or partially cover an end of body 1420 oppositeexpulsion end 1424, and/or to support and hold blocking component 1460and plunger rod 1480 in relation to body 1420. For example, proximalcollar 1442 and channel 1447 may be sized and configured to holdblocking component 1460, and distal collar 1444 and channel 1445 may besized and configured to hold a flange 1421 of body 1420, such thatblocking component 1460 is held stationary in relation to body 1420.Further, blocking component 1460 may be sized and configured to plungerrod 1480 inside body 1420, and to limit movement of plunger rod 1480with respect to body 1420. Flange piece 1440 may include one or moreflanges 1446, which may be sized and configured to aid a user in holdingdevice 1400 and/or expelling a formulated drug substance from expulsionend 1424. In some embodiments, as depicted in FIGS. 8A-8E, flange piece1440 may include two flanges 1446, opposite to one another. In general,other arrangements of a flange or flanges, such as one flange or threeflanges, are possible. Flange piece 1440 may extend radially outwardfrom a central longitudinal axis of device 1400 farther than acircumference of body 1420, to, e.g., support device 1400 if device 1400is placed on a surface, prevent device 1400 from rolling on a flatsurface, and/or allow device 1400 to be picked up more easily.

Channels 1462, 1464, 1468 in blocking component 1460 together form apath through which protrusion 1484 may travel, to allow for controlledmovement of plunger rod 1480. A first channel 1462 may allow forsufficient distal movement of plunger rod 1480 to prime device 1400. Asecond channel 1464 may allow for movement of the plunger rod between a“primed” state and a “delivery” state. Channel 1464 may have a pathrequiring rotation of plunger rod 1480 about a longitudinal axis ofdevice 1400 (as opposed to distal movement of plunger rod 1480), suchthat the likelihood of plunger rod 1480 being accidentally orunintentionally moved to a “delivery” state may be reduced. Channel 1464may provide a path of any suitable length (corresponding to any suitableangle of rotation of plunger rod 1480) to ensure adequate separationbetween the “primed” state and the “delivery” state. A third channel1468 may allow for sufficient distal movement of plunger rod 1480 todispense a predetermined volume of drug substance from device 1400.

One or more of each channel 1462, 1464, 1468 may include one or moredetents, as shown in FIGS. 8F and 8G. For example, a cross sectionalview of blocking component 1460 in FIG. 8F shows an interior of channel1464 having a small detent 1491 disposed on one side. FIG. 8G depictstwo larger detents 1492, 1493 in channels 1462, 1464, respectively. Eachdetent may provide resistance to the movement of protrusion 1484 throughchannels 1462, 1464, and/or 1468 to provide auditory feedback and/or toprevent unintended movement of protrusion 1484. In some embodiments,detents 1491, 1492, 1493 may be angled on one side, to allow for passageof protrusions 1484 in one direction, but not in the other direction.Detents such as those shown in FIGS. 8F and 8G may be suitable forinclusion in any device disclosed herein, as well as in device 1400.

FIGS. 9A-9E depict an exemplary method of using device 1400, accordingto aspects of the present disclosure. In a pre-use configurationdepicted in FIG. 9A, device 1400 may hold a volume of a drug substancein between stopper 1422 and expulsion end 1424. Plunger rod 1480 may bepartially inserted into body 1420 such that protrusion 1484 of plungerrod 1480 is disposed in a proximal end portion of channel 1462. In apriming step depicted in FIG. 9B, plunger rod 1480 may be movedlongitudinally further into body 1420, until distal movement is blockedby the abutment of protrusion 1484 against a distal end of channel 1462.For example, a user may press actuation portion 1482 distally throughblocking component 1460. In some embodiments, device 1400 may be held inan inverted position during this step, to ensure that air trapped inbody 1420 may be expelled, as stopper 1422 is pushed distally by plungerrod 1480. In the “primed” configuration, depicted in FIG. 9C, protrusion1484 of plunger rod 1480 may be disposed at a first end of channel 1464.

In a dispensing preparation step depicted in FIG. 9D, plunger rod 1480may be rotated about a longitudinal axis such that protrusion 1484 ismoved from a first end of channel 1464 to a second end of channel 1464.For example, a user may grasp and twist actuation portion 1482 ofplunger rod 1480. Device 1400 may then be in a ready-to-dispenseconfiguration, wherein protrusion 1484 is disposed at a proximal end ofchannel 1468. As depicted in FIG. 9E, in a dispensing step, plunger rod1480 may be moved longitudinally further into body 1420. For example, auser may press actuation portion 1482 distally, until protrusion 1484abuts a distal end of channel 1468. The dispensing step may ensure thata predetermined volume of a drug substance inside body 1420 is dispensedfrom device 1400.

In some embodiments, after each successive step in the use of device1050, a user may be prevented from re-doing a step, and/or fromreversing one or more steps. For example, geometries of, e.g., plungerrod 1480, protrusion 1484, and/or channels 1462, 1464, 1468 may preventa user from pulling plunger rod 1480 proximally (e.g., out of) body1420.

FIGS. 10A-10C depict an exemplary method of assembly of device 1400. Asdepicted in FIG. 10A, flange piece 1440 may be slidably assembled tobody 1420 such that flange 1421 fits into channel 1445 and collar 1444partially surrounds body 1420. As depicted in FIG. 10B, blockingcomponent 1460 may be slidably assembled to flange piece 1440, such thattabs 1461 rest within channels 1447 and blocking component 1460 abutsproximal collar 1442. As depicted in FIG. 100, plunger rod 1480 may thenbe inserted into the combined blocking component 1460, flange piece1440, and body 1420, such that protrusion 1484 is disposed withinchannel 1462 of body 1460.

FIGS. 10D-10G, 11A-11E, and 12A-12D depict a variation on aconfiguration and method of use of device 1400, and to avoid redundancywill not be described in great detail. FIGS. 10D-10G depict an alternatemethod of assembly of device 1400, where blocking component 1460includes an opening 1463 through which plunger rod 1480 may fit. In thisembodiment, the channels within blocking component 1460 (e.g., channels1462, 1468) may be closed on a proximal and distal end, to preventback-out or over-insertion of plunger rod 1480 relative to body 1420. Asdepicted in FIG. 10E, plunger rod 1480 may be partially inserted intobody 1420, and flange piece 1440 may be slidably assembled to body 1420such that flange 1421 fits into channel 1445 and collar 1444 partiallysurrounds body 1420. As depicted in FIG. 10F, blocking component 1460may be assembled to plunger rod 1480, such that protrusion 1484 isdisposed within one of the channels in blocking component 1460. Asdepicted in FIG. 10G, blocking component 1460 may then be assembled toflange piece 1440 such that it is disposed in channel 1447. Blockingcomponent may be affixed to flange piece 1440 in any suitable manner(e.g., using clips, adhesive, a friction fit, a dovetail connection,etc.). FIGS. 12A-12D depict a close-up view of protrusion 1484 movingthrough the channels of blocking component 1460, per the method of useshown in FIGS. 11A-11E.

FIGS. 13A and 13B depict a further exemplary delivery device 1500, and amethod of assembling said delivery device, according to additionalembodiments of the present disclosure. Device 1500 includes a plungerrod 1580, a blocking component in the form of flange piece 1540, and abody 1520. To assemble device 1500, plunger rod may be inserted intobody 1520 (e.g., as shown in FIG. 13A), such that it abuts or attachesto a stopper 1522 in body 1520, and flange piece 1540 may be slidablyassembled to 1521, e.g., by sliding a channel 1541 on to a flange 1521of body 1520 (e.g., as shown in FIG. 13B). An opening 1543 may allow forflange piece 1540 to be assembled to body 1520 around plunger rod 1580.It is contemplated that, depending on the size, shape, and structure ofeach component of device 1500, alternate methods of assembly arepossible.

Delivery device 1500 may be, for example, an injection device, such as asyringe, for dispensing a predetermined volume of a formulated drugsubstance. Generally, delivery device 1500 may share size, capacity,material, preparation, assembly, or manufacturing characteristics withdevice 1050, device 1200, device 1300, or with other delivery devicesdisclosed herein. As with other devices disclosed herein, deliverydevice 1500 may be configured for ease of use and may include one ormore features that aid a user by providing tactile, auditory, or visualfeedback, using any of the features described elsewhere herein.

FIG. 14A-14F depict a further view of device 1500 and a method of usingdevice 1500. As shown in FIG. 14A, plunger rod 1580 may include anactuation portion 1582, a proximal stop 1588, a proximal neck portion1586, and a distal neck portion 1584. Body 1520 may have any or all ofthe same characteristics as, e.g., body 1060 of device 1050, or as anysyringe body known in the art. For example, in some embodiments, body1520 may be pre-fillable or pre-filled. Stopper 1522 may be configuredto be inserted into body 1520 and may be configured to hold apredetermined volume of a formulated drug substance inside body 1520,between stopper 1522 and an expulsion end 1524.

Flange piece 1540 may be of any suitable size and shape to partiallyclose, cover, or partially cover an end of body 1520 opposite expulsionend 1524, and/or to support and hold plunger rod 1580 in body 1520. Anopening 1542 may have a size and shape configured to allow passage ofplunger rod 1580 in two different configurations. Distal neck portion1584 and proximal neck portion 1586 may have similar shapes, but may berotationally offset from one another (e.g., such that once distal neckportion 1584 passes through opening 1542, plunger rod 1580 must berotated about a longitudinal axis to allow proximal neck portion 1587 topass. Distal neck portion 1584 may include, e.g., a tapered distal side,which may assist in orienting plunger rod 1580 such that distal neckportion 1584 may pass through opening 1542. This may increase the easeof, e.g., a priming step.

FIG. 14A depicts a pre-use configuration of device 1500. In such aconfiguration, device 1500 may hold a volume of a drug substance inbetween stopper 1522 and expulsion end 1524. Plunger rod 1580 may bepartially inserted into body 1520 such that distal neck portion 1584 ispositioned proximally from flange piece 1540. In a priming step depictedin FIG. 14B, plunger rod 1580 may be moved longitudinally further intobody 1520, until distal movement is blocked by the abutment of proximalneck portion 1586 against opening 1542 (as shown in FIG. 14C). Forexample, a user may press actuation portion 1582 until distal neckportion passes through opening 1542. In some embodiments, device 1500may be held in an inverted position during this step, to ensure that airtrapped in body 1520 may be expelled, as stopper 1522 is pushed distallyby plunger rod 1580. In the “primed” state, depicted in FIG. 14D,proximal neck portion 1586 may be disposed against a surface of flangepiece 1540.

In a dispensing preparation step depicted in FIG. 14D, plunger rod 1580may be rotated about a longitudinal axis such that the shape of proximalneck portion 1586 aligns with opening 1542. For example, a user maygrasp and twist actuation portion 1582 of plunger rod 1580. Device 1500may then be in a ready-to-dispense configuration. As depicted in FIG.14E, in a dispensing step, plunger rod 1580 may be moved longitudinallyfurther into body 1520. For example, a user may press actuation portion1582 distally, until proximal stop 1588 abuts a surface of flange piece1540. The dispensing step may ensure that a predetermined volume of adrug substance inside body 1520 is dispensed from device 1500.

In some embodiments, after each successive step in the use of device1500, a user may be prevented from re-doing a step, and/or fromreversing one or more steps. For example, geometries of, e.g., plungerrod 1580, distal neck portion 1584, proximal neck portion 1586, andopening 1542 may interface with one another to prevent a user frompulling plunger rod 1580 proximally (e.g., out of) body 1520.

Additional variations on blocking components, dosage control components,and the like will now be described. FIGS. 15A-23C depict exemplaryplunger rod dials according to further embodiments of the presentdisclosure. For example, FIG. 15A depicts a plunger rod 1600 having anactuation portion 1610. Actuation portion 1610 may have a shapegenerally corresponding to a flange piece 1640. Plunger rod 1600 may berotatable with respect to flange piece 1640 and/or a body of the device.A device may be in a configuration suitable for delivery of a desiredamount of a drug substance when, e.g., a shape of plunger rod 1610 isgenerally aligned with shape of 1640 (as shown in, e.g., the top view ofFIG. 15A). As another example, FIG. 15B depicts an actuation portion1610′ with a ridged side, to allow for ease of rotation of plunger rod1600′ with respect to flange piece 1640 and/or a remainder of thesyringe. FIG. 16A depicts an actuation portion 1610″ with a ribbed side,again to allow for ease of rotation of plunger rod 1600. FIG. 16Bdepicts an exemplary combination of actuation portion 1610″ with device1500. One of ordinary skill in the art will understand that any of theactuation portions or other features described herein may be combinedwith devices described herein.

FIG. 17 depicts an exemplary plunger rod and dial according to furtherembodiments of the present disclosure. An actuation portion 1612 may besized and configured to fit into a collar 1642 of a flange piece 1640′in only a particular configuration. A depth of collar 1642 maycorrespond to, e.g., a distance that plunger rod 1600 must travel todispense a predetermined volume of a drug substance from a drug deliverydevice. In one embodiment, actuation portion 1612 may be moved distallyuntil it abuts collar 1642, and then may be rotated until its shapecorresponds with the shape of collar 1642 so that it may be pushed intocollar 1642 in a dispensing step. FIGS. 18A and 18B depict a furtherexemplary plunger rod and dial, which combine exemplary features thatallow for precision dose delivery. The plunger rod may include, e.g.,protrusions 1684 and 1682, which may each fit through an opening 1641′in a flange piece 1680 in a particular configuration. Each ofprotrusions 1682 and 1684 may correspond to a distance required todeliver a desired volume of a drug substance from a device and/or primethe device. Actuation portion 1650 may include a raised portion 1652,which may aid a user in twisting the plunger rod in relation to flangepiece 1680.

FIGS. 19A and 19B depict a top view of a flange piece 1740 and a plungerrod 1720. Flange piece 1740 and plunger rod 1720 may have across-sectional shape allowing for limited rotation of plunger rod 1720relative to flange piece 1740 in a single direction. For example, flangepiece 1740 may have inner protrusions that may interact with anirregular cross-sectional shape of plunger rod 1720 to resist a firstportion of plunger rod 1720 as it rotates past the inner protrusions,and to stop a second portion of plunger rod 1720 when it abuts the innerprotrusions.

FIG. 20 depicts an exemplary flange piece 1750 with a well 1760 havingclips 1762. A plunger rod actuation portion 1780 may be pushed distallyinto well 1760 until clips 1762 overlay actuation portion 1780, to holdactuation portion 1780 in place and, e.g., prevent back-out of theplunger rod. The plunger rod includes a distal protrusion 1781 and aproximal protrusion 1783, each of which is sized to fit through anopening 1764 when the plunger rod is rotated to a particular position.Distal protrusion 1781 includes a tapered distal side, which may assistin orienting the plunger rod into the position required to advance theplunger rod distally such that distal protrusion 1781 passes throughopening 1764. This may increase the ease of, e.g., a priming step. Insome embodiments, a height of well 1760 and/or actuation portion 1780may correspond to a height that a plunger rod must travel to dispense apredetermined volume of a drug substance. Thus, a device may be primedwhen actuation portion 1780 abuts a proximal side of well 1760, and maydeliver a predetermined volume of a drug substance as actuation portion1780 travels distally into well 1760.

FIG. 21 depicts an exemplary device 1800 with a plunger rod 1820 and acomplementary flange piece 1840. Plunger rod 1820 may include, e.g.,protrusions 1844, 1846 having an angled or wedge shape, corresponding toa shape of one or more openings 1842 in flange piece 1840. The wedge orangled shapes of protrusions 1844, 1846 and openings 1842 may suffice toresist distal movement of plunger rod 1820 when a protrusion 1844 or1846 abuts a side of opening 1842, but may be able to move past oneanother given enough force. The resistance provided by the abutment ofprotrusions 1844, 1846 against the sides of openings 1842 may suffice toindicate to a user that a particular step in the use of device 1800 iscompleted. A user may then apply enough force to move plunger rod 1820past the resistance and continue to a next step (e.g., from a completedpriming step to a delivery-ready step).

As has been described elsewhere, any of the devices disclosed herein maybe combined with labels, auditory feedback, and/or tactical feedback inthe form of symbols (e.g., in FIG. 22 depicted as lock and unlocksymbols 1850, 1852, chevrons 1856 on actuation portion 1854). Rotationof a plunger rod also may be accompanied by a “clicking” sound.

FIGS. 23A-23C depict a further exemplary combination of components in adelivery device. For example, a plunger rod actuation portion 1650 mayinclude, e.g., ribbed sides and a raised portion 1652, to assist intwisting the actuation portion. A device with these characteristics mayinclude, e.g., openings 1842 and corresponding angled protrusions 1844,1846 (described with respect to FIG. 21).

FIGS. 24A-24E depict a further exemplary delivery device 1900 and amethod of using device 1900. Device 1900 may include an actuationportion 1940 and a blocking component 1980 depicted on a plunger rod1920. Plunger rod 1240 may abut a stopper 1912 in a body 1910. Blockingcomponent 1980 may be rotatable relative to plunger rod 1920. In apre-use configuration depicted in FIG. 24B, blocking component 1980 maybe in a first position with respect to plunger rod 1920 and flange piece1960. In a priming step depicted in FIG. 24C, plunger rod 1920 may bemoved longitudinally further into body 1910, until distal movement isblocked by the abutment of blocking component 1980 against a recess 1962in flange piece 1960. For example, a user may press actuation portion1940 distally towards flange piece 1960. In a dispensing preparationstep depicted in FIG. 24D, blocking component 1980 may be rotated suchthat a shorter dimension of blocking component 1980 faces flange piece1960. Recess 1962 may be curved to allow for ease of rotation ofblocking component 1980. A distance between blocking component 1980 andflange piece 1960 after blocking component 1980 is rotated maycorrespond to a distance that plunger rod 1920 may move to dispense apredetermined volume of a drug substance from device 1900. As depictedin FIG. 24E, in a dispensing step, plunger rod 1920 may be movedlongitudinally further into body 1910, until the rotated blockingcomponent 1980 abuts flange piece 1960 in a second position. Forexample, a user may press actuation portion 1940 distally, untilprotrusion blocking component abuts flange piece 1960. The dispensingstep may ensure that a predetermined volume of a drug substance insidebody 1910 is dispensed from device 1900.

FIGS. 25A-25E depict a further exemplary delivery device 2000, and amethod of using delivery device 2000. A plunger rod 2080 of device 2000may include threads 2100, corresponding to inner threads (not pictured)in a flange piece 2062. As depicted in FIG. 25A, plunger rod 2080 may berotatable relative to other portions of device 2000. Plunger rod 2080may also include a protrusion 2082 located proximally from threads 2100(see, e.g., FIG. 25B), which may correspond to an opening 2062 in aflange piece 2062, such that plunger rod 2080 must be in a particularconfiguration and position to allow protrusion 2082 to pass into and/orthrough flange piece 2060. In a pre-use configuration depicted in FIG.25C, threads 2100 and protrusion 2082 may be positioned proximally toflange piece 2060. In a priming step, plunger rod 2080 may be rotatedwith respect to the inner threads of flange piece 2060 until threads2100 pass through flange piece 2060 and/or protrusion 2082 preventsfurther rotation or distal movement of plunger rod 2080. In a dispensingpreparation step, protrusion 2082 may be moved towards opening 2062. Ina dispensing step, protrusion 2082 may be moved through opening 2062 tofurther advance plunger rod 2080, and to dispense a predetermined volumeof a drug substance inside the body of device 2000.

FIGS. 26A-26E depict a delivery device 2200 having further variations ondosage control components. For example, device 2200 includes a plungerrod 2280 with one or more clips 2284, each of which may be configured toslide distally into a channel 2242 of a flange piece 2240 and, oncehaving slid distally, to resist sliding proximally out of channel 2242(e.g., to prevent or resist back-out of plunger rod 2280). Flange piece2240 may further have a second channel 2244 and a third channel 2246,through which each of clips 2284 may slide in delivery preparation anddosage delivery steps, as has been previously described. Alternately, asshown in FIG. 26B, channel 2242′ may have an open proximal end throughwhich a protrusion 2284′ may move, allowing for proximal and/or distalmovement of a plunger rod 2280 relative to flange piece 2240′. Asdepicted in FIG. 26C, in a pre-use configuration, clips 2284 may bedisposed proximally to channels 2242 of flange piece 2240. In a primingstep, plunger rod 2280 may be moved distally into a body of device 2200,until clips 2284 move into channels 2242 and abut a distal end ofchannels 2242. In a dispensing preparation step, plunger rod 2280 may berotated relative to flange piece 2240. In a dispensing step, plunger rod2280 may be moved further distally into a body of device 2200 todispense a predetermined volume of the drug substance from device 2200.

In other embodiments, as shown in FIGS. 26F-26G, a flange piece 2240″may include one or more projections 2246″ disposed within a collar2242″. In the present example, collar 2242″ may include a pair ofprojections 2246″ extending radially inward from an interior surface ofcollar 2242″ and in opposite directions relative to another. Forexample, projections 2246″ may be disposed approximately 180 degreesaway from one another. It should be appreciated that flange piece 2240″may include additional and/or fewer projections 2246″ than those shownand described herein without departing from a scope of this disclosure.Flange piece 2240″ may be configured to engage a plunger rod 2080″ inresponse to plunger rod 2280″ receiving projections 2246″.

As seen in FIG. 26G, a plunger rod 2280″ may include an actuation member2284″ defined by a proximal end 2282″ and a distal end 2283″. Plungerrod 2280″ may include a series of channels along opposing sides ofactuation member 2284″, such as, for example, a first channel 2286″, asecond channel 2288″, and a third channel 2290″ positioned betweenproximal end 2282″ and distal end 2283″. First channel 2286″ is offsetfrom third channel 2290″ and connected to third channel 2290″ by secondchannel 2288″ positioned therebetween. As described in detail below,first channel 2286″ may define a longitudinal and axial priming path ofplunger rod 2280″, second channel 2288″ may define a circumferentialpath of plunger rod 2280″, and third channel 2290″ may define alongitudinal and axial dose completion path. It should be appreciatedthat an opposing surface and/or side of actuation member 2284″ (notshown) includes a substantially similar series of interconnected firstchannel 2286″, second channel 2288″, and third channel 2290″ as seen inFIG. 26G. In the present example, first channel 2286″ and third channel2290″ may be aligned parallel relative to one another.

First channels 2286″, second channels 2288″, and third channels 2290″may be sized, shaped, and configured to receive at least one of the pairof projections 2246″. With plunger rod 2280″ coupled to flange piece2240″, projections 2246″ may protrude and slide through first channels2286″, second channels 2288″, and third channels 2290″ to prime anddeliver a dosage from device 2200 (FIG. 26A) as described in detailabove. In some embodiments, first channels 2286″ may have an open end atproximal end 2282″ through which projections 2246″ may be received in.In some embodiments, first channels 2286″ may have a closed proximal endand projections 2246″ may be at least partially flexible and/ordeformable such that projections 2246″ may be configured to flexradially-outward when being received at the proximal end of firstchannels 2286″. In other embodiments, first channels 2286″ may have asloped, chamfered, and/or tapered end to facilitate guiding projections2246″ toward second channels 2288″. In this instance, the sloped end mayinhibit retraction (e.g., proximal movement) of plunger rod 2280″relative to flange piece 2240″. A longitudinal length of first channels2286″ may define an axial priming path (e.g., an amount or extentpriming) that is configured to facilitate proximal and/or distalmovement of plunger rod 2280″ relative to flange piece 2240″. Forexample, projections 2246″ may be disposed at a proximal end of firstchannels 2286″ and proximally of second channels 2288″ when device 2200is in an assembly state. In a priming step, plunger rod 2280″ may movedistally relative to flange piece 2240″ until projections 2246″ arepositioned within second channels 2288″ and at a distal end of firstchannels 2286″. Second channels 2288″ may define a circumferential pathof plunger rod 2280″.

In a dispensing preparation step, plunger rod 2280″ may be rotatedrelative to flange piece 2240″ to translate projections 2246″ laterallythrough the circumferential path of second channels 2288″ and toward adose completion path defined by third channels 2290″. In someembodiments, plunger rod 2280″ and/or flange piece 2240″ may beconfigured to generate a user feedback (e.g., tactile, audible, visual,etc.) when device 1050 is in the dispensing preparation step. In adispensing step, plunger rod 2280″ may move distally into a body ofdevice 2200 to dispense a controlled volume of substance by translatingprojections 2246″ through third channels 2290″. A longitudinal length ofthird channels 2290″ may define a dosage delivery path (e.g., a dosageamount). It should be appreciated that the axial priming path (length offirst channels 2286″) may vary relative to the dosage delivery path(length of third channels 2290″). In other embodiments, plunger rod2280″ may include additional and/or fewer channels along actuationmember 2284″ (e.g., corresponding to a quantity of projections 2246″ onflange piece 2240″), or have various other relative channelconfigurations, than those shown and described herein.

FIGS. 27A-27H depict an exemplary delivery device 2300 and method ofusing delivery device 2300. An actuation portion 2350 may also serve asa blocking component of device 2300. Actuation portion 2350 may beslidably coupled to plunger rod 2380 in two configurations, via achannel 2352. As depicted in FIG. 27B, one side of actuation portion2350 may include a channel 2354. A depth of channel 2354 may correspondto a distance that a plunger rod may move to dispense a predeterminedvolume of a drug substance once device 2300 has been primed. As depictedin FIG. 27C and FIG. 27D, in a pre-use configuration, actuation portion2350 may be assembled onto plunger rod 2380 such that a flat side ofactuation portion 2350 faces a collar 2360 of device 2300. In a primingstep, actuation portion 2350 may be used to move plunger rod 2380distally until the flat side 2356 of actuation portion 2350 abuts aproximal side of collar 2360. To prepare for a dosage delivery step,actuation portion 2350 may be removed from plunger rod 2380, and may berotated or flipped and reassembled with plunger rod 2380 such thatchannel 2354 faces collar 2360, as depicted in FIGS. 27F and 27G. In adosage delivery step, actuation portion 2350 may be used to push plungerrod 2380 further distally, until a proximal end of collar 2360 abuts aninner end of channel 2354. This movement of plunger rod 2380 may besufficient to dispense a predetermined dose of a drug substance fromdevice 2300.

FIGS. 28A-28C depict an exemplary delivery device 2400 and method ofusing delivery device 2400. Delivery device 2400 may includesubstantially similar features as those shown and described above suchthat like reference numerals are used to identify like components. Asshown in FIG. 28A, delivery device 2400 may include a removable clip2402 coupled to body 1060 at a position distal to flange piece 1070.Removable clip 2402 may be an obstruction and/or blocking componentconfigured to inhibit movement of flange piece 1070 relative to body1060. Removable clip 2402 is selectively removable such that removableclip 2402 may be configured to disengage body 1060 in response to manualactuation of removable clip 2402.

By way of illustrative example, removable clip 2402 may have a body thatwraps about an exterior of body 1060 and is configured to selectivelydeform (e.g., break, tear, etc.) upon application of a force thereto todecouple removable clip 2402 from body 1060. In other examples,removable clip 2402 may have a flexible body that is configured to bendin response to a radially-outward force being applied thereto, therebydisengaging removable clip 2402 from body 1060. By way of furtherexample, removable clip 2402 may have a body that is configured toselectively transition between a closed configuration encapsulating acircumference of body 1060 therein and an open configuration permittingremoval of body 1060 from the body of removable clip 2402. Removableclip 2402 may include various other suitable sizes, shapes, and/orconfigurations than those shown and described herein without departingfrom a scope of the present disclosure.

Delivery device 2400 may include a radial wall 1063 extending laterallyoutward from an exterior of body 1060, thereby forming an obstructionalong body 1060. As seen in FIG. 28A, radial wall 1063 may be configuredto inhibit distal translation of removable clip 2402 along body 1060. Insome embodiments, radial wall 1063 may be an add-component attached tobody 1060, while in other embodiments, radial wall 1063 may beintegrally formed onto body 1060. Referring now to FIG. 28B, flangepiece 1070 and plunger rod 1080 may be configured to translate distallyalong body 1060 to prime delivery device 2400 upon removal of removableclip 2402 from body 1060. In this instance, plunger rod 1080 may remainstationary relative to flange piece 1070, as the combined assembly offlange piece 1070 and plunger rod 1080 moves relative to body 1060. Inother embodiments, plunger rod 1080 may remain stationary as flangepiece 1070 translates distally along body 1060 to prime delivery device2400. For example, at least a portion of flange piece 1070 may extendinto body 1060 (e.g., and behind stopper 1062) when priming device 2400.In this instance, plunger rod 1080 may be translated separately todeliver a dosage from delivery device 2400.

With flange piece 1070 translated from a proximal position (FIG. 28A) toa distal position (FIG. 28B), delivery device 2400 may be in a primedposition. It should be appreciated that body 1060 may be configured tolimit movement by flange piece 1070 to a defined distance based on alocation of radial wall 1063, which may correspond to a priming distanceof delivery device 2400. Accordingly, a priming distance of deliverydevice 2400 may be controlled by adjusting a range of movement of flangepiece 1070 along body 1060.

As seen in FIG. 28C, plunger rod 1080 may be translated distallyrelative to body 1060 in response to applying a distally-directed forceonto actuation portion 1082. In this instance, stem 1081 may moverelative to flange piece 1070, thereby causing stopper 1062 to movewithin body 1060 to deliver a dose. It should be appreciated that anextent that plunger rod 1080 translates relative to flange piece 1070may define a dosage delivery distance of delivery device 2400. Thedosage delivery distance may be controlled based on a gap formed betweencollar 1072 and actuation portion 1082.

In other embodiments, as seen in FIGS. 28D-28F, delivery device 2400 mayfurther include a locking component, such as, for example, a removablerod 2404 coupled to flange piece 1070. Referring specifically to FIG.28D, removable rod 2404 may be received through a proximal end of collar1072, such as, for example, through one or more lateral apertures (notshown) formed through collar 1072. Removable rod 2404 may be configuredto inhibit movement of plunger rod 1080 relative to flange piece 1070,such as, for example, preventing receipt of actuation portion 1082 intocollar 1072. Removable rod 2404 may be selectively removable andconfigured to disengage collar 1072 upon manual actuation of removablerod 2404. It should be appreciated that delivery device 2400 may includevarious other locking components in addition to and/or in lieu ofremovable od 2404, such as, for example, a pin, a tab, a bar, and thelike.

For example, referring now to FIG. 28E, flange piece 1070 and plungerrod 1080 (e.g., stem 1081 and actuation portion 1082) may be configuredto translate distally along body 1060 to prime delivery device 2400 inresponse to removal of removable clip 2402 from body 1060. Plunger rod1080 may remain stationary relative to flange piece 1070 as the assemblyof flange piece 1070 and plunger rod 1080 moves relative to body 1060.With flange piece 1070 translated from a proximal position (FIG. 28D) toa distal position (FIG. 28E), delivery device 2400 may be in a primedposition. It should be appreciated that body 1060 may be configured tolimit movement by flange piece 1070 to a defined distance based on alocation of radial wall 1063 along body 1060, which may correspond to apriming distance of delivery device 2400.

As seen in FIG. 28F, removable rod 2404 may be disengaged from collar1072 such that plunger rod 1080 is no longer inhibited from movingdistally relative to flange piece 1070. Actuation portion 1082 may betranslated into collar 1072 to move stem 1081 and stopper 1062 withinbody 1060 to deliver a dose. An extent that plunger rod 1080 translatesrelative to flange piece 1070 may define a dosage delivery distance ofdelivery device 2400.

In other embodiments, as seen in FIGS. 28G-28I, removable clip 2402 maybe omitted entirely such that delivery device 2400 may include a singleobstruction and/or blocking component, i.e., rod 2404. In this instance,flange piece 1070 may be fixed relative to body 1060. With actuationportion 1082 positioned proximally of rod 2404, delivery device 2400 maybe primed in response to plunger rod 1080 translating distally towardflange piece 1070 until encountering rod 2402. It should be appreciatedthat flange piece 1070 and/or rod 2404 may be configured to inhibitdistal translation of plunger rod 1080 relative thereto absent anapplication of a distally-directed force thereto. In other examples,delivery device 2400 may include a blocking component positioned betweenactuation portion 1082 and rod 2404 (e.g., removable clip 2404) toinhibit distal movement of plunger rod 1080.

Accordingly, a priming distance of delivery device 2400 may be definedby a distance between the distal end of actuation portion 1082 and rod2404 when delivery device 2400 is in an assembled, pre-primed state(FIG. 28G). With actuation portion 1082 engaged against rod 2402, asseen in FIG. 28H, delivery device 2400 may be in a primed state. Rod2402 may be removed from collar 1072 to thereby allow furthertranslation of plunger rod 1080 distally relative to flange piece 1070.As shown in FIG. 28I, a dose may be delivered from delivery device 2400in response to collar 1072 receiving actuation portion 1082. It shouldbe appreciated that a longitudinal offset of a distal end of actuationportion 1082 and an inner surface of collar 1072 may be determinative toa dosage delivery distance. Accordingly, an extent (e.g., the dosagedelivery distance) that plunger rod 1080 translates relative to flangepiece 1070 may define a volume of dosage delivered by delivery device2400.

In further embodiments, as shown in FIGS. 28J-28L, delivery device 2400may include a fixed clip 2406 attached to body 1060 at a locationrelatively distal of removable clip 2402. Fixed clip 2406 may be anobstruction and/or blocking component positioned in contact withremovable clip 2402 such that fixed clip 2406 may be configured toinhibit movement of removable clip 2402 along body 1060. With flangepiece 1070 positioned proximally of removable clip 2402, fixed clip 2406may be further configured to inhibit movement of flange piece 1070 whenremovable clip 2402 is positioned therebetween.

Referring now to FIG. 28K, flange piece 1070 may be configured totranslate distally along body 1060 to prime delivery device 2400 uponremoving removable clip 2402 from body 1060. In this instance, plungerrod 1080 may remain stationary relative to flange piece 1070 as theassembly of plunger rod 1080 and flange piece 1070 moves toward fixedclip 2406. With flange piece 1070 translated from a proximal position(FIG. 28J) to a distal position (FIG. 28K) engaged against fixed clip2406, delivery device 2400 may be in a primed position. It should beappreciated that body 1060 may be configured to limit movement by flangepiece 1070 to a defined distance, which may correspond to a primingdistance of delivery device 2400.

As seen in FIG. 28L, plunger rod 1080 may be translated distallyrelative to body 1060 in response to applying a distally-directed forceonto actuation portion 1082. Stem 1081 may move relative to flange piece1070, causing stopper 1062 to move within body 1060 to deliver a dose.It should be appreciated that an extent that plunger rod 1080 translatesrelative to flange piece 1070 may define a dosage delivery distance ofdelivery device 2400. The dosage delivery distance may be controlledbased on a position of fixed clip 2406 along body 1060.

In further embodiments, delivery device 2400 may include a sleeve 2408extending distally from flange piece 1070, as shown in FIG. 28M. Sleeve2408 may be attached to a distal end of flange piece 1070 and/or beintegral with flange piece 1070, thereby forming a unitary structure.Sleeve 2408 may be disposed within body 1060 and include a distal end2410. Sleeve 2408 may define a lumen that is sized and shaped to receivestem 1081 when plunger rod 1080 is coupled to flange piece 1070. Asdescribed in further detail herein, sleeve 2408 may be configured tomove within a lumen of body 1060 in response to flange piece 1070translating along an exterior of body 1060.

Sleeve 2408 may further include a locking component, such as, forexample, a second protrusion 2412 formed along an interior surface ofsleeve 2408 such that second protrusion 2412 extends at least partiallyinto the lumen defined by sleeve 2408. In the embodiment, secondprotrusion 2412 is positioned relatively proximal of distal end 2410. Inother embodiments, sleeve 2408 may include various other suitablelocking components in lieu of second protrusion 2412, such as, forexample, an opening sized, shaped, and configured to receive protrusion1085.

Referring specifically to FIG. 28M, protrusion 1085 may extend radiallyoutward from stem 1081 and positioned proximally relative to secondprotrusion 2412 when plunger rod 1080 is received through flange piece1070 and sleeve 2408. To prime delivery device 2400, plunger rod 1080may be translated distally relative to flange piece 1070 and sleeve 2408until protrusion 1085 contacts second protrusion 2412. It should beappreciated that an extent that plunger rod 1080 translates relative tosleeve 2408 may define a priming distance of delivery device 2400. Thepriming distance may be controlled based on a position of protrusion1085 and second protrusion 2412 relative to one another.

With protrusion 1085 engaged against second protrusion 2412 and a distalend of actuation portion 1082 received against an inner surface ofcollar 1072, plunger rod 1080 may be coupled to sleeve 2408 and deliverydevice 2400 may be in a primed state, as shown in FIG. 28N. Actuationportion 1082 may be fully received within collar 1072 and stem 1081 maybe locked onto sleeve 2408. Accordingly, further translation of plungerrod 1080 may provide translation of flange piece 1070 and sleeve 2408relative to body 1060. For example, as seen in FIG. 28O, plunger rod1080 and flange piece 1070 may be translated distally relative to body1060 in response to applying a distally-directed force onto actuationportion 1082. Stem 1081 may move relative to body 1060, causing stopper1062 to move within body 1060 to deliver a dose.

Distal end 2410 may translate toward expulsion end 1064 as plunger rod1080 and flange piece 1070 move distally until encountering fixed clip2406. It should be appreciated that an extent that plunger rod 1080 andflange piece 1070 translate may define a dosage delivery distance ofdelivery device 2400. The dosage delivery distance may be controlledbased on a position of fixed clip 2406 along body 1060.

In other embodiments, as seen in FIGS. 28P-28Q, delivery device 2400 mayinclude an obstruction and/or blocking component in the form of a pulltab 2420. Pull tab 2420 may include a body 2422 having a circular-crosssection defining a center opening 2424. Body 2422 may be formed ofvarious flexible materials, including, for example, plastic, rubber, andthe like. As described in further detail herein, pull tab 2420 may befrangible and/or deformable in response to an application of force ontobody 2422. Pull tab 2420 may further include a graspable feature 2426extending outwardly from body 2422 and configured to facilitate manualactuation of pull tab 2420. As seen in FIG. 28P, graspable feature 2426may be integrally formed with body 2422 such that applying aradially-outward force (e.g., a pulling force) onto graspable feature2426 may cause body 2422 to deform (e.g., tear, break, etc.), as shownin FIG. 28Q.

Referring now to FIG. 28R, pull tab 2420 may be secured to flange piece1070 along a proximal end of collar 1072. Pull tab 2420 may be disposedover collar 1072 such that flange piece 1070 is separated from actuationportion 1082 by pull tab 2420 positioned therebetween. Stem 1081 may bereceived through center opening 2424 and into collar 1072 when body 2422is attached to collar 1072. Pull tab 2420 may be configured to inhibittranslation of actuation portion 1082 into collar 1072. A thicknessand/or width of body 2422 may be sized such that a diameter of centeropening 2424 is smaller than a diameter of actuation portion 1082 toblock actuation portion 1082 from passing through pull tab 2420.

Delivery device 2400 may be primed in response to translating plungerrod 1080 distally relative to flange piece 1070 until encountering body2422, as seen in FIG. 28S. It should be appreciated that an extentplunger rod 1080 translates relative to flange piece 1070 may correspondto a priming distance of delivery device 2400. The priming distance maybe controlled based on a thickness of body 2422, thereby varying arelative distance between actuation portion 1082 and collar 1072. Withactuation portion 1082 engaged against body 2422, graspable feature 2426may be actuated to remove (e.g., break, tear, pull, etc.) pull tab 2420from collar 1072. In this instance, body 2422 may be deformed (see FIG.28Q) and disengaged from flange piece 1070, thereby permitting furthertranslation of plunger rod 1080 distally relative to flange piece 1070.

As seen in FIG. 28T, actuation portion 1082 may be received withincollar 1072 in response to applying a distally-directed force ontoactuation portion 1082. Stem 1081 may move relative to body 1060,causing stopper 1062 to move within body 1060 to deliver a dose. Itshould be appreciated that an extent that plunger rod 1080 translatesrelative to collar 1072 may correspond to a dosage delivery distance ofdelivery device 2400. The dosage delivery distance may be controlledbased on a thickness of pull tab 2420, thereby varying a relativedistance between actuation portion 1082 and a distal (e.g., bottom) endof collar 1072.

In further embodiments, as shown in FIGS. 28U-28X, delivery device 2400may include a removable cap 2430 coupled to plunger rod 1080. Removablecap 2430 may include a body 2432 defining a cavity 2434 that is sizedand shaped to receive at least a portion of plunger rod 1080 therein(e.g., actuation portion 1082). Removable cap 2430 may include anopening along a bottom (e.g., distal) wall of body 2342 for receivingstem 1081. In some embodiments, removable cap 2430 may be attached toactuation portion 1082, while in other embodiments body 2342 may bedirectly coupled to stem 1081. Removable cap 2340 may be an obstructionand/or blocking component configured to increase a cross-sectionalprofile of actuation portion 1082 to inhibit movement of plunger rod1080 relative to flange piece 1070, and more specifically to preventtranslation of actuation portion 1082 into collar 1072.

Referring now to FIG. 28V, plunger rod 1080 may be configured totranslate distally relative to flange piece 1070 to prime deliverydevice 2400 until a bottom wall of body 2432 encounters a proximal endof collar 1072. Removable cap 2430 may inhibit actuation portion 1082from being received within collar 1072 due to at least a portion of body2342 being disposed between actuation portion 1082 and collar 1072. Withplunger rod 1080 translated from a proximal position (FIG. 28U) to adistal position (FIG. 28V) with body 2432 engaged against collar 1072,delivery device 2400 may be in a primed position. It should beappreciated that an extent that plunger rod 1080 translates relative toflange piece 1070 may correspond to a priming distance of deliverydevice 2400. The priming distance may be controlled based on a size ofremovable cap 2430 and/or a position of removable cap 2430 relative toplunger rod 1080. For example, in other embodiments, a bottom wall ofbody 2432 may be secured to a proximal portion of stem 1081 positionedrelatively distal of actuation portion 1082. In this instance, a primingdistance of delivery device 2400 may be reduced relative to that shownand described herein as body 2432 may be positioned in closer proximityto collar 1072. Accordingly, plunger rod 1080 may be required to move asmaller distance for removable cap 2430 to encounter collar 1072.

As seen in FIG. 28X, removable cap 2430 may be detached from plunger rod1080 such that actuation portion 1082 may be exposed from body 2432.Plunger rod 1080 may be translated distally relative to body 1060 andreceived within collar 1072 in response to applying a distally-directedforce onto actuation portion 1082. Stem 1081 may move relative to flangepiece 1070, causing stopper 1062 to move within body 1060 to deliver adose. It should be appreciated that an extent that plunger rod 1080translates relative to flange piece 1070 may correspond to a dosagedelivery distance of delivery device 2400. The dosage delivery distancemay be controlled based on an attachment of removable cap 2430 relativeto actuation portion 1082 and/or stem 1081 as described above. Further,a depth of collar 1072 may be determinative of the dosage deliverydistance such that a size of collar 1072 may be adjusted accordingly toform various suitable dosage delivery distances.

For example, attaching removable cap 2430 such that a distal wall ofremovable cap 2430 is positioned flush against a distal end of actuationportion 1082 may increase a relative priming distance of delivery device2400 by providing a longer separation between removable cap 2430 andcollar 1072. Accordingly, the attachment position of removable cap 2430may correspond to a smaller dosage delivery distance upon translatingactuation portion 1082 into collar 1072 after removal of removable cap2420. Alternatively, attaching removable cap 2430 such that the distalwall of removable cap 2430 is positioned distally from the distal end ofactuation portion 1082 may decrease a relative priming distance, therebyproviding a greater dosage delivery distance as actuation portion 1082may require further longitudinal translation to be fully received withincollar 1072. It should be appreciated that a size and/or shape ofremovable cap 2430 may vary to accommodate the various attachmentpositions described above.

In some embodiments, as shown in FIGS. 28W-28Z, delivery device 2400 mayinclude one or more tabs 2440 secured to plunger rod 1080, such as, forexample, along actuation portion 1082, stem 1081, and/or various otherportions of plunger rod 1080. In the example, delivery device 2400includes a pair of tabs 2440 extending radially outward from a distalend of actuation portion 1082. Tabs 2440 may be an obstruction and/orblocking component configured to increase a cross-sectional profile ofactuation portion 1082 to inhibit movement of plunger rod 1080 relativeto flange piece 1070, and more specifically to inhibit translation ofactuation portion 1082 into collar 1072. In some embodiments, tabs 2440may be selectively removable from actuation portion 1082 upon anapplication of force thereto. In other embodiments, tabs 2440 may becompressible and configured to be pushed into actuation portion 1082 inresponse to an application of force thereto. In either instance, tabs2440 may be configured to transition actuation portion 1082 from anexpanded profile (FIGS. 28W-28Y) to a compressed profile (FIG. 28Z).

Referring now to FIG. 28Y, plunger rod 1080 may be configured totranslate distally relative to flange piece 1070 to prime deliverydevice 2400 until tabs 2440 encounter a proximal end of collar 1072.Tabs 2440 may inhibit collar 1072 receiving actuation portion 1082therein. With plunger rod 1080 translated from a proximal position (FIG.28W) to a distal position (FIG. 28Y) with tabs 2440 engaged againstcollar 1072, delivery device 2400 may be in a primed position. It shouldbe appreciated that an extent that plunger rod 1080 translates relativeto flange piece 1070 may correspond to a priming distance of deliverydevice 2400.

The priming distance may be controlled based on a size (e.g., thickness,width, height, etc.) of tabs 2440 and/or a position of tabs 2440relative to plunger rod 1080. For example, in other embodiments, thepair of tabs 2440 may be secured to an intermediate and/or proximalportion of actuation portion 1082, or alternatively along stem 1081. Inthis instance, a priming distance of delivery device 2400 may beincreased and/or decreased, respectively, relative to that shown anddescribed herein.

As seen in FIG. 28Z, tabs 2440 may be compressed into actuation portion1082 by collar 1072 applying an inward, pushing force thereto (oralternatively decoupled from actuation portion 1082 by applying anoutward, pulling force, a rotating snapping force, or the like) suchthat actuation portion 1082 may form a smaller cross-sectional profile.Plunger rod 1080 may be translated distally relative to body 1060 andreceived within collar 1072 in response to applying a distally-directedforce onto actuation portion 1082. Stem 1081 may move relative to flangepiece 1070, causing stopper 1062 to move within body 1060 to deliver adose. It should be appreciated that an extent that plunger rod 1080translates relative to flange piece 1070 may correspond to a dosagedelivery distance of delivery device 2400. As described above, thedosage delivery distance may be controlled based on a position of tabs2440 relative to actuation portion 1082, a size (e.g., longitudinaldepth) of collar 1072, and the like. For example, a relative position oftabs 2440 that increases a priming distance of delivery device 2400 maycorrespond to a smaller dosage delivery distance, and a position of tabs2440 that corresponds to a reduced priming distance may provide agreater dosage delivery distance. In other examples, plunger rod 1080may include a second set of tabs (not shown) along actuation portion1082 which may define a dosage delivery distance based on a relativeposition of the tabs relative to tabs 2440.

FIGS. 29A-29C depict an exemplary delivery device 2500 and method ofusing delivery device 2500. Delivery device 2500 may includesubstantially similar features as those shown and described above suchthat like reference numerals are used to identify like components. Asshown in FIG. 29A, delivery device 2500 may include a plunger rod 2580comprising a first actuation portion 2502, a second actuation portion2504, and a cam lever 2510. First actuation portion 2502 may be coupledto second actuation portion 2504 by one or more arms 2506. In theexample, a pair of arms 2506 may be fixed to first actuation portion2502 along a first end of arms 2506, and arms 2506 may be furthercoupled to second actuation portion 2504 at a second end of arms 2506that is opposite of the first end. Second actuation portion 2504 may bea rotatable element including a proximal end 2505 and an opposing distalend having a joint 2508. The pair of arms 2506 may be coupled to thedistal end of second actuation portion 2504 at joint 2508.

It should be understood that, when in a ready position as seen in FIG.29A, second actuation portion 2504 may be oriented such that joint 2508is positioned proximate to first actuation portion 2502 relative toproximal end 2505. A proximal end 1088 of stem 1081 may be positionedadjacent to joint 2508 at a distal end of second actuation portion 2504.For example, proximal end 1088 may be in contact with and/or abutagainst the distal end of second actuation portion 2504. In someembodiments, stem 1081 may extend through a center of first actuationportion 2502 and/or be positioned alongside first actuation portion2502. Second actuation portion 2504 may be configured to move relativeto first actuation portion 2502 and about joint 2508. Cam lever 2510 maybe coupled to second actuation portion 2504 at joint 2508 and configuredto move (e.g., rotate, pivot, translate, etc.) second actuation portion2504 relative to first actuation portion 2502. Accordingly, it should beappreciated that second actuation portion 2504 may be configured to movestem 1081 relative to body 1060 in response to cam lever 2510 movingsecond actuation portion 2504 relative to first actuation portion 2502.

For example, referring to FIG. 29A, cam lever 2510 may be actuated byrotating cam lever 2510 about joint 2508, thereby causing secondactuation portion 2504 to rotate about joint 2508. Proximal end 2505 maybe moved toward first actuation portion 2502 in response to secondactuation portion 2504 rotating about joint 2508. In this instance,proximal end 2505 may be moved toward first actuation portion 2502. Withproximal end 2505 moved from a proximal position (FIG. 29A) to a distalposition (FIG. 29B), proximal end 1088 may be pushed distally, therebytranslating stem 1081 relative to body 1060 to prime delivery device2500. Stated differently, rotation of cam lever 2510 and/or secondactuation portion 2504 relative to first actuation portion 2502 mayprime delivery device 2500 by forcing stem 1081 distally.

It should be appreciated that a travel length of proximal end 2505toward first actuation portion 2502 may correspond to a priming distanceof delivery device 2500. In other words, a priming distance of deliverydevice 2500 may be controlled by a longitudinal length of secondactuation portion 2504 between proximal end 2505 and joint 2508. In someembodiments, first actuation portion 2502, arms 2506, and/or cam lever2510 may be to inhibit further rotation of second actuation portion 2504after plunger rod 2580 is moved from the ready position (FIG. 29A) tothe primed position (FIG. 29B).

As seen in FIG. 29C, plunger rod 2580 may be translated distallyrelative to body 1060 in response to applying a distally-directed forceonto first actuation portion 2502 and second actuation portion 2504. Inthis instance, cam lever 2510 may be depressed (e.g., pushed and/orpulled) distally to move first actuation portion 2502 and secondactuation portion 2504 toward flange piece 1070 until encountering aproximal end of collar 1072. Stem 1081 may move relative to collar 1072thereby causing stopper 1062 to move within body 1060 to deliver a dose.It should be appreciated that an extent of translation of plunger rod2580 relative to flange piece 1070 may correspond to a dosage deliverydistance of delivery device 2500. The dosage delivery distance may becontrolled based on a gap formed between collar 1072 and cam lever 2510.

FIGS. 30-31 depict an exemplary delivery device 2600 that may includesubstantially similar features as those shown and described above suchthat like reference numerals are used to identify like components.Delivery device 2600 may include a flange piece 2670, a plunger rod2680, and body 1220. Flange piece 2670 may include a tapered collar 2672having a varying size and/or shape between a distal end and a proximalend. In the example, tapered collar 2672 may have a greatercross-sectional profile (e.g., diameter) along a distal end adjacent toflanges 1076 than at a proximal end adjacent to slots 1074. Taperedcollar 2672 may be configured to minimize an overall profile and/orweight of delivery device 2600 by minimizing a configuration of flangepiece 2670. In some embodiments, flanges 1076 may have a reduced lengthto facilitate enhanced control and maneuverability of flange piece 2670.

Plunger rod 2680 may include an actuation portion 2682 having across-sectional profile (e.g., diameter) that is relatively smaller thantapered collar 2672 to facilitate receipt of actuation portion 2682therethrough. Accordingly, actuation portion 2682 may be similarlyconfigured to minimize an overall profile and/or weight of deliverydevice 2600 by minimizing a configuration of actuation portion 2682.Further, plunger rod 2680 may omit inclusion of a textured and/or ribbedsurface along actuation portion 2682 to simplify an exterior appearanceof plunger rod 2680.

Referring specifically to FIG. 30, actuation portion 2682 may furtherinclude a proximal end having an outer ring 2687, an inner surface 2688,and one or more openings 2689 formed through inner surface 2688. In theexample, inner surface 2688 may be disposed within outer ring 2687 andmay have an angled profile that is sloped radially-inward toward the oneor more openings 2689. Inner surface 2688 may be configured to define aninterface for actuating plunger rod 2680 (e.g., applying adistally-directed force onto actuation portion 2682 by a finger of auser). Although plunger rod 2680 is shown as including a pair ofopenings 2689, it should be appreciated that in other embodimentsadditional and/or fewer openings 2689 may be included on inner surface2688.

In some embodiments, as seen in FIG. 31, plunger rod 2680 may include anouter ring 2687′ having a width that defines an outer surface disposedabout inner surface 2688. For example, an outer surface of outer ring2687′ may be angled inwardly toward inner surface 2688 and openings 2689and/or be transverse relative to inner surface 2688. In the presentexample, outer ring 2687′ defines a planar outer surface that issubstantially perpendicular to a longitudinal length of actuationportion 2682. The enhanced width of outer ring 2687′ may provideadditional surface area for a user of device 1050 to contact whenactuating plunger rod 2680. It should be appreciated that a width ofouter ring 2687′ may be greater and/or less than that shown anddescribed herein without departing from a scope of this disclosure.

FIGS. 32-33 depict an exemplary plunger rod 2780 that may includesubstantially similar features as plunger rod 1080 shown and describedabove such that like reference numerals are used to identify likecomponents. Plunger rod 2780 may include an actuation portion 2782having a proximal end defined by an outer ring 2787, an inner ring 2788,and one or more openings 2789. In the example, inner ring 2788 may bedisposed within outer ring 2787 and may define at least one opening2789. Outer ring 2787 may further define at least one opening 2789positioned radially outward of inner ring 2788. One or more of openings2789 may minimize an overall weight of plunger rod 2780, enhance amolding manufacturing ability of plunger rod 2780 by providing nominalwall thicknesses for actuation portion 2782, and more. Additionally,actuation portion 2782 may include a lateral ledge 2786 extending acrossa width of the distal end and aligned with protrusions 1086. Lateraledge 2786 may bifurcate the one or more openings 2789 defined by outerring 2787 and inner ring 2788. Lateral edge 2786 may be collinear withprotrusions 1086 to provide visual alignment and/or identification ofprotrusions 1086 to a user of plunger rod 2780.

As seen in FIG. 33, with plunger rod 2780 received within flange piece1070 and body 1220, lateral edge 2786 may be configured to enhance anidentification of movement by plunger rod 2780 relative to flange piece1070 from a perspective proximal of device 1200. For example, lateralledge 2786 may facilitate identifying a relative position of protrusions1086 to slots 1074 from a perspective proximal to actuation portion 2782during use of device 1200. In some embodiments, plunger rod 2780 mayomit a textured and/or ribbed surface along actuation portion 2782 tosimplify an exterior appearance of plunger rod 2780.

FIG. 34 depicts another exemplary delivery device 2800 in accordancewith an example of this disclosure. Delivery device 2800 may includesubstantially similar features as delivery device 1050 and deliverydevice 1200 shown and described above such that like reference numeralsare used to identify like components. Delivery device 2800 may include aflange piece 2870, a plunger rod 2880, and body 1220. Flange piece 2870may have a collar 2872 and a pair of flanges 2876 extending laterallyoutward from collar 2872. Collar 2872 may have a narrowed profile, suchas, for example, relative to collar 1072. Additionally, flanges 2876 mayhave a shortened length relative to flanges 1076. Accordingly, flangepiece 2870 of the present example may generally have a narrowed profile.Flange piece 2870 may further include a lip 2871 that may slide under orotherwise receive body flange 1226 (FIG. 35). Lip 2871 may be configuredto hold flange piece 2870 in place by slidably coupling flange piece2870 to body 1220. As described in further detail below, lip 2871 may bemade of a flexible or semi-flexible material capable of forming asnap-fit connection with body flange 1226.

Plunger rod 2880 may include an actuation portion 2882 having one ormore protrusions 1086 along a proximal end and one or more extensions1087 along a distal end. Actuation portion 2882 may have a diameter thatis generally smaller than actuation portion 1082 shown and describedabove. Accordingly, it should be appreciated that plunger rod 2880 andflange piece 2870 may collectively form a narrowed profile relative toan assembly of plunger rod 1080 and flange piece 1070. By providing areduced profile, delivery device 2800 may be configured to provide auser enhanced control and maneuverability of plunger rod 2880 and flangepiece 2870 during use of delivery device 2800.

In the embodiment, protrusions 1086 may have a curvature configured toenhance a grip, comfort, and/or ergonomics of plunger rod 2880 for auser of delivery device 2800. A curvature of protrusions 1086 may have aconcave exterior configuration that taper inwardly along a distalportion of protrusions. A proximal end of actuation portion 2882 mayfurther include a first ring 2887, an opening 2888, and a second ring2889 positioned distally relative to first ring 2887. First ring 2887may define a proximal interface of actuation portion 2882 and opening2888 may be positioned at a center of first ring 2887. The proximalinterface defined by first ring 2887 may be angled toward opening 2888such that a proximal end of actuation portion 2882 may be slopedradially inward. In some embodiments, first ring 2887 may be sized,shaped, and configured to facilitate actuation of plunger rod 2880 bydefining a finger pad for receiving a finger of a user. Opening 2888 maybe configured to maintain a nominal wall thickness of actuation portion2882 to facilitate molding of plunger rod 2880 during a manufacturingprocess of delivery device 2800. Openings 2888 may further minimize anoverall weight of plunger rod 2880.

Still referring to FIG. 34, second ring 2889 may extend radially outwardfrom an exterior surface of actuation portion 2882 and is positionedadjacent to first ring 2887. Second ring 2889 may be configured to forma graspable feature along actuation portion 2882 to enhance control ofplunger rod 2880, such as, for example, when rotating plunger rod 2880.First ring 2887 may have a greater diameter than actuation portion 2882such that the finger pad formed by first ring 2887 may have a greatercross-sectional profile than actuation portion 2882. In someembodiments, second ring 2889 may include a diameter greater thanactuation portion 2882 and substantially similar to first ring 2887.Plunger rod 2880 may omit inclusion of a textured and/or ribbed surfacealong actuation portion 2882 to simplify an appearance of plunger rod2880.

As seen in FIG. 35, actuation portion 2882 may be sized to have apredetermined length C between a distal end of protrusion 1086 and hookor clip shaped part 1087 a of extensions 1087. In some embodiments,predetermined length C may be sized in accordance with a type and/orsize of a syringe cap used with delivery device 2800 (e.g., Ompi AlbaITC, Ompi Alba OVS, Gerresheimer TELC, silicone-free syringes, etc.).For example, predetermined length C may be decreased and/or increasedaccording to a lower and/or higher fill volume requirement,respectively, determined based on the syringe cap. Further,predetermined length C may be sized to provide a complete stroke ofplunger rod 2880 into flange piece 2870 to ensure a complete dosage isdelivered by delivery device 2800. The predetermined length C may befurther adjusted to provide one of a plurality of suitable dosagedelivery distances for delivery device 2800. Flange piece 2870 mayinclude additional features and/or components configured to allow for acomplete stroke of plunger rod 2880.

For example, referring now to FIG. 36, flange piece 2870 may include oneor more indents 2875 formed along a proximally-facing anddistally-located (bottom) surface of collar 2872. Indent 2875 may besized and/or shaped to form a recessed surface into the bottom surfaceof collar 2872. Indent 2875 may be configured to facilitate receipt ofplunger rod 2880 into flange piece 2870 to allow for a complete stroke.Stated differently, indent 2875 may provide an increased space and/orclearance within collar 2872 to receive one or more components ofplunger rod 2880, such as, for example, hook or clip shaped part 1087 aof extensions 1087.

In the present example, delivery device 2800 may be configured todeliver a complete dose upon the pair of protrusions 1086 contacting adistal end (the bottom) of slots 1074. The pair of extensions 1087 maybe positioned adjacent to (but not in contact with) a bottom surface ofcollar 2872 when protrusions 1086 contact the distal end of slots 1074.That is, in some embodiments, extensions 1087 may positioned proximal tothe bottom surface of collar 2872 such that extensions 1087 do notcontact the bottom surface when plunger rod 2880 has bottomed out and/orwhen a complete dose has been delivered from delivery device 2800. Byforming a depression along the bottom surface of collar 2872, indent2875 may allow actuation portion 2882 to translate distally relative tocollar 2872 to complete a full stroke of plunger rod 2880 withoutextensions 1087 engaging or contacting the bottom surface of collar2872. In some embodiments, extensions 1087 may bend inwardly towardindent 2875 upon hook or clip shaped parts 1087 a encountering thebottom surface of collar 2872, thereby guiding hook or clip shaped parts1087 a into indent 2875. It should be appreciated that an increasedspace formed by indent 2875 may ensure extensions 1087 are not preventedfrom contacting the bottom surface of collar 2872 to complete the fullstroke of plunger rod 2880 and/or to deliver a complete dose.

Still referring to FIG. 36, flange piece 2870 may further include one ormore ribs 2874 configured to engage body flange 1226 when body 1220 iscoupled to flange piece 2870. The one or more ribs 2874 may bepositioned adjacent to lip 2871, such as, for example, distally of thebottom surface of collar 2872 and proximally of lip 2871. In someembodiments, ribs 2874 may extend radially inward from an inner sidewallof flange piece 2870, while in other embodiments ribs 2874 may extendoutwardly from an inner top wall of flange piece 2870. In the presentexample, ribs 2874 may extend radially inward at an angle relative tothe inner sidewall of flange piece 2870. It should be appreciated thatribs 2874 may be positioned and/or extend from various other suitablelocations, and at various other suitable angles, within flange piece2870 for engaging body flange 1226.

In the embodiment, ribs 2876 may be formed of a flexible and/orsemi-flexible material (e.g., plastic, rubber, etc.) and configured tointeract with body flange 1226 upon receipt of body 1220 within flangepiece 2870. By way of illustrative example, ribs 2874 may be configuredto flex and/or bend proximally toward a bottom surface of collar 2872 inresponse to lip 2871 receiving body flange 1226. Ribs 2874 may beoperable to secure body flange 1226 to flange piece 2870 by applying adistally-directed force thereto. Accordingly, ribs 2874 may secure aposition (e.g., longitudinal, rotational, etc.) of body 1220 relative toflange piece 2870 by engaging a top/proximal surface of body flange 1226as lip 2871 engages a bottom surface of body flange 1226. In otherembodiments, additional and/or fewer ribs 2874 may be included forinhibiting movement of body flange 1226 and/or body 1220 relative toflange piece 2870.

Referring now to FIG. 37, flange piece 2870 may include a texturedand/or patterned interface 2878 along a bottom, distally-facing surfaceof flanges 2876. Textured interface 2878 may include one or moreprotrusions, depressions, and/or various other features forming at leastone of a plurality of patterns to enhance a grip, control, and/orergonomics of flange piece 2870. In the example, textured interface 2878includes a plurality of semi-circular protrusions of varying sizes. Asshown in FIG. 37, each interface 2878 may be concave when viewed from aradial center of flange 2876. However, in alternate embodiments, one ormore interface 2878 may be convex when viewed from the radial center offlange 2876. As described in further detail below, textured interface2878 may include various other designs, features, and/or patterns alongthe bottom surface (see FIGS. 41A-41D) of flanges 2876. Flange piece2870 may further include a pair of movable tabs 2877 positioned adjacentto lip 2871 and along opposing sides of opening 1073. Movable tabs 2877may be formed of a flexible and/or semi-flexible material and may beconfigured to move relative to collar 2872 and/or flanges 2876 inresponse to a force being applied thereto (e.g., by body 1220).

Each movable tab 2877 may define an opening 2873 disposed betweenmovable tab 2877 and flange 2876. Accordingly, movable tabs 2877 may beseparated from flanges 2876 by opening 2873 formed therebetween.Openings 2873 may provide a gap and/or clearance space to accommodatelateral movement of movable tabs 2877 upon receiving a radially-outwarddirected force. For example, movable tabs 2877 may be deflected radiallyoutward toward flanges 2876 in response to flange piece 2870 receivingbody 1220 through opening 1073, thereby changing a size and/or shape ofopenings 2873. In this instance, movable tabs 2877 may bend outwardlyaway from opening 1073 until body flange 1226 is received by lip 2871.Movable tabs 2877 may be configured to bend inwardly toward body 1220 toreturn to an original configuration upon lip 2871 fully receiving bodyflange 1226 therein. In some embodiments, movable tabs 2877 may bendtoward body 1220 to a substantially originally configuration such thatmovable tabs 2877 may remain at least partially compressed against body1220 to inhibit movement of body 1220 relative to flange piece 2870 toallow pressure to be continually applied onto body 1220 to preventslippage.

Still referring to FIG. 37, movable tabs 2877 may be configured to applya radially-inward directed force onto body 1220 (e.g., with aradially-inward directed material bias), thereby forming a snap-fitconnection between flange piece 2870 and body 1220. Additionally,movable tabs 2877 may maintain body 1220 in a stabilized and fixedposition relative to flange piece 2870, thereby coupling flange piece2870 to body 1220. It should be appreciated that openings 2873 may beincluded between movable tabs 2877 and flanges 2876 to decrease arequired force to couple body 1200 to flange piece 2870. For example,openings 2873 may be operable to reduce a force necessary to snap body1200 into flange piece 2870 by a minimum force ranging from about 15Newton to about 25 Newton, compared to a design omitting openings 2873.

FIGS. 38A-40C show an illustrative method of using delivery device 2800.As seen in FIG. 38A, delivery device 2800 may be preassembled with adistal portion of actuation portion 2882 received within collar 2872 andextensions 1087 received within and coupled to openings 1094. Withextensions 1087 coupled to collar 2872 via openings 1094, it should beappreciated that flange piece 2870 may inhibit proximal retraction ofactuation portion 2882. Accordingly, disassembly of plunger rod 2880from flange piece 2870 may be prevented. In this instance, deliverydevice 2800 may be primed by distally translating plunger rod 2880 intoflange piece 2870.

As seen in FIG. 38B, actuation portion 2882 may be translated distallyrelative to flange piece 2870 until protrusions 1086 encounter aproximal end of collar 2872. Plunger rod 2880 may complete a primingprocess of delivery device 2800 upon protrusions engaging and/orabutting collar 2872. It should be appreciated that an extent thatplunger rod 2880 translates distally relative to flange piece 2870 maycorrespond to a priming distance of delivery device 2800. The primingdistance may be controlled based on a longitudinal length of protrusions1086 and/or extensions 1087, thereby varying a relative distance betweenthe proximal end of collar 2872 and a distal end of protrusions 1086.

As shown in FIG. 38C, flange piece 2870 may be rotated relative toplunger rod 2880, or vice versa, to move protrusions 1086 relative tocollar 2872 until arriving into radial and longitudinal alignment withslots 1074. Referring to FIGS. 39A-39B, extensions 1087 may contact aninterior surface 2872A of collar 2872 as plunger rod 2880 rotatesrelative to flange piece 2870. As seen in FIG. 39D, with hook or clipshaped part 1087 a engaged against interior surface 2872A, extensions1087 may be deflected radially-inward by collar 2872 until plunger rod2880 is rotated to align extensions 1087 with internal grooves 2879 offlange piece 2870. Internal grooves 2879 may define recesses formedalong interior surface 2872A. As seen in FIG. 39C and FIG. 39E, internalgrooves 2879 may be sized and shaped to receive extensions 1087 therein.It should be appreciated that collar 2872 may have a greater diameter atinternal grooves 2879 than along interior surface 2872A such thatextensions 1087 are configured to expand radially-outward from acompressed configuration (FIGS. 39A-39B and FIG. 39D) to an expandedconfiguration (FIG. 39C and FIG. 39E) when extensions 1087 are movedinto radial alignment with internal grooves 2879.

Stated differently, extensions 1087 may be transitioned to a relaxedstate when received within internal grooves 2879 due to the additionalspace provided by internal grooves 2879, as seen in FIG. 39E. In someinstances, a feedback (e.g., tactile, auditory, etc.) may be generatedin response to extensions 1087 being received within internal grooves2879. Delivery device 2800 may be positioned in a dosage delivery statesuch that further actuation of plunger rod 2880 may provide a dosedelivery. In some embodiments, flange piece 2870 may be operable togenerate a user feedback (e.g., tactile, audible, etc.) upon rotatingplunger rod 2880 relative to flange piece 2870 to prime delivery device2800.

As described in detail above and as seen in FIGS. 40A-40C, opening 1073may have a semi-circular shape with one or more edges 2873 extendinginto opening 1073. With plunger rod 2880 coupled to flange piece 2870,stem 1280 may be received through opening 1073. Stem 1280 may include arounded sidewall 2884 that is configured to interact with the one ormore edges 2873 as plunger rod 2880 rotates relative to collar 2872. Forexample, rounded sidewall 2884 may define a semi-circular end along stem1280 that may contact edges 2873 when plunger rod 2880 is moved from theprimed position (FIG. 38B) to the dosage delivery position (FIG. 38C).As described in detail above (FIGS. 4K-4X), it should be appreciatedthat stem 1280 may have various suitable shapes and/or configurationsfor facilitating movement (e.g., rotation) of plunger rod 2880 relativeto flange piece 2870.

Referring now to FIG. 38D, with protrusions 1086 aligned with slots1074, actuation portion 2880 may be translated distally relative tocollar 2872 to complete a full stroke of plunger rod 2880 in response toapplying a distally-directed force onto actuation portion 2882. In thisinstance, stem 1280 may move relative to flange piece 2870, therebycausing stopper 1222 to move within body 1220 to deliver a dosage. Inthis instance, protrusions 1086 may be received within slots 1074 andsecond ring 2889 may be positioned proximate to a proximal end of collar2872. In other words, in some embodiments, second ring 2889 does notcontact the proximal end of collar 2872. Further, as described ingreater detail above, indents 2875 may receive extensions 1087 (FIG. 36)therein when completing a full stroke of plunger rod 2880. It should beappreciated that an extent that plunger rod 2880 translates relative toflange piece 2870 may define a dosage delivery distance of deliverydevice 2800. The dosage delivery distance may be controlled based on alongitudinal length of protrusions 1086 relative to actuation portion2882 and/or a depth of slots 1074 relative to collar 2872.

As seen in FIGS. 41A-41D, delivery device 2800 may include various otherflange pieces 2870 having at least one of a plurality of texturedinterfaces on flanges 2876. As merely an illustrative example, as seenin FIG. 41A, an alternative exemplary flange piece 2870A may include atextured interface 2878A on flanges 2876 comprising a plurality ofcircular protrusions and/or depressions arranged in an annular arrayrelative to one another. As seen in FIG. 41B, another exemplary flangepiece 2870B may include a textured interface 2878B comprising anornamental design, such as a snowflake, on each flange 2876. FIG. 41Cshows an exemplary flange piece 2870C including a textured interface2878C on flanges 2876 comprising a plurality of circular protrusionsand/or depressions arranged in an irregular pattern relative to oneanother.

By way of further example, referring now to FIG. 41D, a flange piece2870D may include a textured interface 2878D comprising a plurality ofdiamond-shaped protrusions and/or apertures positioned in a grid-likearrangement along flanges 2876. It should be understood that the varioustextured interfaces shown and described herein may be configured toenhance a grip, control, aesthetic, and/or ergonomics of the flangepiece. It should further be appreciated that the textured interfacesshown and described herein are merely illustrative such that variousother suitable patterns, textures, and/or features may be included onthe flange pieces without departing from a scope of this disclosure.

Components of the devices described herein may be designed and/or suitedfor manufacture in one or more ways. In some embodiments, for example,components of the devices described herein (e.g., device 1050, device1200, device 1300, device 1400, device 2400, device 2500, device 2600,device 2800, etc.) may be suitable for manufacture via, e.g., injectionmolding, 3-dimensional printing, or machining. In one embodiment, forexample, components of device 1050 may be particularly suited formanufacture via injection molding. For example, in some existingdevices, molding is not suitable for high volume production, resultingin the use of 3-dimensional printing. In some embodiments, whilemanufacturing tolerances may be tighter with molding techniques thanwith 3-dimensional printing techniques, devices formed by 3-dimensionalprinting do not have the same level of precision as devices formed bymolding. Precision may be particularly important for devices of thepresent disclosure, for example, those devices used for vitreousinjections at volumes of 100 μL or less.

Accordingly, it should be appreciated that devices of the presentdisclosure described herein may be designed to store predefined volumesof therapeutic agent that may be suitable for vitreous (IVT) injections,such as, for example, 100 μL or less. In some embodiments, the devicesdescribed herein may be designed for injection of certain volumes ofvitreous based on an intended use of the device in a particularprocedure. For example, devices of the present disclosure may beconfigured to store a volume of vitreous of about 65 μL to about 75 μLfor high dose aflibercept procedures; about 95 μL to about 105 μL forMini Trap procedures; and/or about 5 μL to about 15 μL for Retinopathyof Prematurity (ROP).

Devices of the present disclosure may be further configured to storerelatively greater volumes of vitreous for injection based on a degreeof myopia, such as about 3 milliliters, 4 milliliters, and greater.Additionally, the devices described herein may be designed for injectionof larger volumes of vitreous based on an intended procedure, such as,about 3 ml to about 6 ml of silicone or gas for tamponade postvitrectomy. It should be appreciated that the devices of the presentdisclosure may be designed to inject various other volumes of vitreousrelative to other procedures, such as, Diabetic Eye Disease,post-injection noninfectious Endophthalmitis, Neovascular (Wet)Age-related Macular Degeneration (AMD), Macular Edema following RetinalVein Occlusion (RVO), Diabetic Macular Edema (DME), and DiabeticRetinopathy (DR).

Devices of the present disclosure are operable to provide accuratemeasurements in delivering large volumes of vitreous with high precisionby minimizing instances of user error in improperly setting a dose line.As described in detail above, the various designs and configurations ofthe one or more components of the devices described herein (e.g., aplunger rod, a flange piece, etc.) may provide dosage precision bycontrolling a priming distance and a dosage delivery distance of thedevice, thereby removing user determination in setting the device ateach respective configuration.

Features enumerated above have been described within the context ofparticular embodiments. However, as one of ordinary skill in the artwould understand, features and aspects of each embodiment may becombined, added to other embodiments, subtracted from an embodiment,etc. in any manner suitable to assist with controlled preparation and/ordelivery of a drug.

Aspects of the embodiments disclosed herein are described with respectto priming drug delivery devices and removing excess air bubbles fromwithin drug delivery devices, and some embodiments disclosed herein aredescribed as being particular types of drug delivery devices (e.g.,pre-filled syringes). Aspects of the present disclosure may also beemployed and/or found in other types of drug delivery devices (e.g.,fillable syringes, pipettes, and the like). For example, devices havingfeatures according to the present disclosure may provide more precisemeans for transferring a volume of a drug substance or other fluid fromone container to another, such as from a vial to a syringe. Theprecision in fluid transfer afforded by embodiments disclosed herein mayreduce or minimize unwanted overfilling and/or decrease wastage of adrug substance.

While a number of embodiments are presented herein, multiple variationson such embodiments, and combinations of elements from one or moreembodiments, are possible and are contemplated to be within the scope ofthe present disclosure. Moreover, those skilled in the art willappreciate that the conception upon which this disclosure is based mayreadily be used as a basis for designing other devices, methods, andsystems for carrying out the several purposes of the present disclosure.

What is claimed is:
 1. A drug delivery device, comprising: a body; aplunger rod including a proximal end portion and a distal end portiondisposed partially inside the body, wherein the proximal end portion hasa diameter greater than a diameter of the distal end portion; aprotrusion extending from an outer surface of the proximal end portionof the plunger rod; and a blocking component coupled to a proximal endportion of the body, wherein the blocking component is a flange piecethat includes a channel with an open distal end and a slot with a closeddistal end, wherein, when the protrusion is in a first position relativeto the blocking component, the protrusion is misaligned with the slotand the blocking component restricts distal movement of the plunger rodthrough the open distal end to a first stopping point, and when theprotrusion is in a second position relative to the blocking component,the protrusion is aligned with the slot and the blocking componentrestricts distal movement of the plunger rod through the open distal endto a second stopping point when the protrusion abuts against the closeddistal end.
 2. The drug delivery device of claim 1, further comprising:a stopper disposed in the body, wherein distal movement of the plungerrod distally moves the stopper; and a drug substance disposed in thebody in between the stopper and a distal end of the body, wherein distalmovement of the plunger rod to the first stopping point primes the drugdelivery device, and distal movement of the plunger rod to the secondstopping point dispenses a predetermined volume of the drug substancefrom a distal end of the device.
 3. The drug delivery device of claim 1,wherein moving the protrusion from the first position to the secondposition includes twisting the plunger rod relative to the blockingcomponent, such that the protrusion is positioned external to theblocking component when in the second position.
 4. The drug deliverydevice of claim 1, wherein the slot is positioned on a proximal side ofthe blocking component, the slot is sized and configured to receive adistal end of the protrusion, such that a proximal end of the protrusionis positioned external to the slot when the distal end is receivedwithin the slot, wherein when the protrusion is in the second positionrelative to the blocking component, the distal end of the protrusion ispositioned proximally from the slot and disengaged from the proximalside of the blocking component, such that distal movement of the plungerrod moves the distal end of the protrusion into the slot.
 5. The drugdelivery device of claim 4, wherein the slot is a first slot and theprotrusion is a first protrusion, and further comprising: a second slotin a proximal side of the blocking component, the second slot sized andconfigured to receive a second protrusion extending from the outersurface of the proximal end portion of the plunger rod, wherein thefirst and second slots are located on opposite sides of a centrallongitudinal axis of the drug delivery device.
 6. The drug deliverydevice of claim 4, wherein, when the protrusion is in the first positionrelative to the blocking component, the proximal side engages the distalend of the protrusion and restricts distal movement of the plunger rodto the first stopping point; and when the protrusion is in the secondposition relative to the blocking component, the distal end of theprotrusion aligns with the slot and is disengaged from the proximalside.
 7. The drug delivery device of claim 6, wherein the plunger rodfurther includes a pair of extensions protruding distally from anactuation portion of the proximal end portion, and the blockingcomponent includes a pair of openings; and wherein a portion of eachextension is configured to be received by one of the pair of openings,prior to the plunger rod moving to the first stopping point, to restrictproximal movement of the plunger rod relative to the blocking component.8. The drug delivery device of claim 7, wherein the blocking componentincludes one or more indents formed along a bottom wall of the blockingcomponent; and wherein a portion of each extension is configured to bereceived by the one or more indents upon distal movement of the plungerrod relative to the blocking component to allow distal movement of theplunger rod to the second stopping point.
 9. The drug delivery device ofclaim 7, wherein the blocking component includes a pair of internalgrooves formed along a sidewall of the blocking component; and wherein aportion of each extension is configured to be received by at least oneof the pair of internal grooves upon rotation of the plunger rodrelative to the blocking component to expand the extensionsradially-outward from a compressed state to a relaxed state.
 10. Thedrug delivery device of claim 1, wherein the blocking component isslidably coupled to the body and includes a cavity and a pair of ribsthat extend into the cavity, wherein the body includes a top flange andthe pair of ribs are configured to engage the top flange received in thecavity; and wherein the pair of internal ribs are configured to apply adistally-directed force onto the top flange.
 11. The drug deliverydevice of claim 1, wherein the blocking component is slidably coupled tothe body and includes a pair of moveable tabs that are configured toengage the body; and wherein the pair of moveable tabs are laterallydeflectable upon receiving the body in the blocking component and areconfigured to apply a radially-inward directed force onto the body. 12.A drug delivery device, comprising: a body; a plunger rod having adistal end contacting a stopper inside the body, and a proximal endincluding an actuation portion with a thumb pad; a plurality ofprotrusions extending from the thumb pad and along the actuationportion; and a blocking component disposed on the body, the blockingcomponent including a proximal collar having a proximal-facing surface,a channel with an open distal end, and a plurality of slots extendingpast the proximally-facing surface, each of the plurality of slotsincluding a closed distal end; wherein, when the protrusions and theslots are in a first configuration relative to one another, the plungerrod is moveable relative to the blocking component until theproximally-facing surface abuts against the plurality of protrusions andthe blocking component restricts distal movement of the plunger rodthrough the open distal end to a first stopping point, wherein, in thefirst configuration, the plurality of protrusions are misaligned withthe plurality of slots; and wherein, when the protrusions and the slotsare in a second configuration, the proximally-facing surface isseparated from the plurality of protrusions and the plunger rod ismoveable relative to the blocking component until the blocking componentrestricts distal movement of the plunger rod through the open distal endto a second stopping point, wherein, in the second configuration, theslots are aligned with the protrusions and configured to receive theprotrusions until each of the protrusions abuts against the closeddistal end of the slots.
 13. The drug delivery device of claim 12,wherein the protrusions and the slots are moveable from the firststopping point to the second stopping point by rotation of the actuationportion about a longitudinal axis in relation to the blocking component,and translation of the plunger rod relative to the blocking component;wherein when the protrusions and the slots are at the second stoppingpoint, the protrusions and the slots are not rotatable.
 14. The drugdelivery device of claim 12, wherein a longitudinal difference betweenthe first stopping point and the second stopping point is equivalent toa distance that the stopper must travel to expel a predetermined volumeof a drug product from a distal end of the body, the distance defined bya depth of the slots from the proximally-facing surface of the blockingcomponent, and wherein the plunger rod is prevented from moving from thesecond stopping point to the first stopping point.
 15. The drug deliverydevice of claim 12, wherein the drug delivery device is changeable: (a)from a pre-use state to a primed state, by longitudinally moving theplunger rod until the plunger rod reaches the first stopping point; (b)from the primed state to a delivery state by rotating the plunger rod inrelation to the blocking component until the protrusions and theblocking component are in the second configuration; and (c) from thedelivery state to a used state by longitudinally moving the plunger roduntil the plunger reaches the second stopping point, and wherein thedrug delivery device is not changeable from the used state to thedelivery state, from the delivery state to the primed state, or from theprimed state to the pre-use state.
 16. The drug delivery device of claim15, wherein the plunger rod includes a neck disposed distally from theactuation portion, wherein the neck interfaces with an opening in theblocking component to prevent proximal movement of the plunger rod. 17.The drug delivery device of claim 16, wherein the neck furtherinterfaces with the opening in the blocking component to preventmovement of the drug delivery device from the delivery state to theprimed state.
 18. The drug delivery device of claim 12, wherein when theplunger rod is at the second stopping point, the stopper does notcontact a distal end of the body.
 19. A drug delivery device,comprising: a body; a plunger rod extending along a longitudinal axis,including: a distal portion contacting a stopper inside the body; aproximal end including a generally cylindrical actuation portion and athumb pad disposed outside of the body, the thumb pad positionedproximal to the generally cylindrical actuation portion; and twoprotrusions extending from opposite sides of the actuation portion in asymmetrical configuration, wherein distally-facing surfaces of the twoprotrusions are located at a same longitudinal position along thelongitudinal axis; and a blocking component coupled to the body, theblocking component including: a collar having a channel with an openproximal end configured to accept a distal part of the actuationportion, and an open distal end configured to accept the distal portionof the plunger rod; and two slots in the collar having closed distalends, wherein each slot is configured to accept a distal portion of oneof the two protrusions; wherein the plunger rod is longitudinallymoveable and rotatable about a longitudinal axis relative to theblocking component, and wherein, when the drug delivery device is in apre-use state, the protrusions and the slots are not longitudinallyaligned such that the plunger rod is moveable relative to the opendistal end until the distally-facing surfaces abut against the collar,and when the drug delivery device is in a delivery state, theprotrusions and the slots are longitudinally aligned such that theplunger rod is moveable relative to the open distal end until thedistally-facing surfaces abut against the closed distal ends.
 20. Thedrug delivery device of claim 19, wherein the plunger rod furtherincludes: two extensions protruding distally from the actuation portion;and a plurality of openings in the collar of the blocking component,wherein a portion of each extension is configured to be received by oneof the plurality of openings upon distal movement of the plunger rodrelative to the blocking component.